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: Hello. 
 agent: Hello, how can I aid you? 
 __ 
 agent: Sure, can you share your trip dates? 
 customer: My travelling dates are 18 to 20 of Nov. 
 agent: Do you have any specifications? 
 customer:  I am willing to travel in a single connecting flight. 
 agent: May I know your name? 
 customer: I am Alexander Perez. 
 agent: There is a connecting flight with number 1025 in airline AA, the fare is 100 in economy class. Can I book it? 
 customer: Please proceed. 
 agent: Your ticket is reserved. 
 customer: Thanks for helping me. 
 agent: Thank you for opting us.
A:
customer: Can you help me to book a flight ticket from IAD to LAS?