Detailed Instructions: 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.
Problem:customer: Hello. 
 agent: Hello, how can I aid you today? 
 __ 
 agent: Sure, do you need a connecting flight? 
 customer: I need a connected flight. 
 agent: When do you want to start and return on? 
 customer: I would like to depart on June 13 and return on June 15. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: Can I know your good name? 
 customer: My name is Gary Lewis. 
 agent: Thank you for your details, we found a connecting flight 1020 in class economy which is in Frontier airline. Shall I proceed? 
 customer: Ok, please proceed for booking. 
 agent: Your ticket has been confirmed. 
 customer: Thank you. 
 agent: Thank you.
Solution:
customer: Can you please assist me for booking from DCA to SFO to attend for a seminar?