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.
Q: customer: Hi. 
 agent: Hello. How can I assist you? 
 __ 
 agent: Sure, can I know the travel dates please? 
 customer: Sure, my preferable dates of travel is from 04/29 to 05/01. 
 agent: There is a flight in Delta airline with price 100, can I book it? 
 customer: Ok, please book it. 
 agent: Your ticket has been booked with flight number 1027. 
 customer: Thank you for your help in booking my ticket. 
 agent: Thank you for approaching us.
A:
customer: I am Brenda Hall here, I want to reserve my ticket from PHL to SEA to visit Seattle, can you please help me to book a ticket?