You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, your good name please?

USER: I am Cynthia Collins.

ASSISTANT: Ok, may I help you now?

USER:  I would like to visit Houston for a business meeting, can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, I am here to help you. May I know your airport code please?

USER: My source is IAD and destination is HOU.

ASSISTANT: Along with that I need your travel dates?

USER: I planned my trip on 07/12 to 07/14.

ASSISTANT: A flight numbered 1007 in UA airline is matching your criteria. Can I proceed to book?

USER: Sure, book it.

ASSISTANT: Ok, your ticket has been booked successfully.

USER: Thank you.

ASSISTANT: Thanks for reaching us, have a nice journey with UA airlines.