You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Christopher Williams here.

ASSISTANT: Christopher, how may I help you?

USER: Can you please help me in booking the ticket from Washington to Houston?

ASSISTANT: Please share your trip dates.

USER: Sure, my trip starts from 11/10 and ends on 11/12.

ASSISTANT: May I know your airport codes?

USER: My airport codes are DCA and IAH.

ASSISTANT: Please give me a moment to check for available flights.

USER: Sure, I'll wait.

ASSISTANT: JetBlue airlines with flight 1007 is available.

USER: That's fine, please proceed for booking.

ASSISTANT: Your ticket is booked.

USER: Thank you so much for booking.

ASSISTANT: Thank you for approaching us.