You are a flight assistant. 
 USER: Hi. Cynthia Wright here.

ASSISTANT: Hello, how may I help you today?

USER: I would like to prefer a flight with lay-by option for my business trip to Washington. Can you book the flight ticket?

ASSISTANT: Sure, help me with the trip dates?

USER: The trip dates are from Apr 30 to May 02.

ASSISTANT: May I know your airport codes that you wish to board and land?

USER: The airport codes are from IAD to DCA.

ASSISTANT: Do you have any preferences?

USER: No.

ASSISTANT: There is a flight in an airline JetBlue with 1026 number having a single connection in an economy class. Shall I proceed to book?

USER: I am fine with the airlines. You can book it.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.