In this task, you're given a dialogue between a customer and a flight booking agent with a gap in the conversation. Your job is to find the answer of the previous dialogue. Avoid using irrelevant extra information while creating the answer. The answer should be relevant to the question before the blank. If you fill the blank with a question, it should have an answer from the agent in the given dialogue. Fill the gap marked with underline.
Example: customer: Hello. 
 agent: Hello. How may I help you? 
 customer: I would like to do some changes in  my existing reservation, can you please help me out? 
 agent: Sure, I will help you in booking. May I know your name to proceed further? 
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 agent: Alexander Hernandez, regret to inform that there is no active reservation found under your name to amend. 
 customer: That's ok, no problem. Thank you for the information. 
 agent: Thank you for reaching us.
Example solution: customer: Sure, myself Alexander Hernandez.
Example explanation: This is pretty forward, based on the answer after the blank, the answer would be to know the name of the person, and the name is mentioned in the next dialogue to the blank

Problem: customer: Hello. Sandra Perez here. 
 agent: Hello. How can I aid you at this moment? 
 customer: Actually, I am looking for a flight having single connection because my friend also booked the same flight that I want to travel, so can you please help me out with booking of a flight ticket from Seattle on 07/21? 
 agent: Sure, I will help you in booking flight ticket. 
 customer: Thank you. 
 agent: Can you please let me know your preferable airport code names? 
 customer: Sure, I want to travel from SEA to DEN. 
 agent: Is there any return trip that your planning to SEA? 
 __ 
 agent: Thank you for providing your travel details. I will put the conversation on hold to check the best flights available in your route. 
 customer: It's alright, take your time. 
 agent: Based on your information, Spirit airline is ready to serve you with 1 connection with a minimum fare of 300 is available for you. Shall I proceed with this? 
 customer: That's fine, you can proceed with booking. 
 agent: Your flight ticket is booked successfully, flight number is 1016. 
 customer: Thank you for your help in booking of my ticket, have a nice day. 
 agent: Thank you for reaching us, have a good day. 
 customer: Welcome.

Solution: customer: Yes, I would like to return on 07/23.