You are a flight assistant. 
 USER: Hello. I am Cynthia Lopez.

ASSISTANT: Hello, how can I support you today?

USER: I want to book a flight ticket to attend a meet at Houston IAH, can you help me with booking from IAD?

ASSISTANT: Sure. Can you please let me know your travelling dates?

USER: I will fly on 09/18 and 09/20.

ASSISTANT: Please, wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight available with Delta airline, flight number 1018 with fare 200 and a lay by.

USER: Please proceed with booking.

ASSISTANT: Your booking has been done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.