You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am William Nelson.

ASSISTANT: How can I assist you?

USER: I would like to book a ticket from IAH to DCA, can you help me?

ASSISTANT: Sure, I can help you with that. May I know your preferable travel dates please?

USER: My travel dates are 02/13 and 02/15.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: JetBlue airlines is having a flight on that route with travel charge of 300, shall I proceed for booking?

USER: You can book it.

ASSISTANT: I have successfully booked your ticket with flight-1025, have a safe journey.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.