You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Here John Roberts.

ASSISTANT: How may I assist you?

USER: I want to travel from DEN to IAH to meet my brother, can you help me out?

ASSISTANT: Sure, I will help you. May I know your planned trip dates please?

USER: My preferable dates are 10/06 and 10/08.

ASSISTANT: Please hold on a moment, John.

USER: Sure, take your own time.

ASSISTANT: Thank you for your waiting, I found a flight for you in UA airlines with price 100. Can I proceed?

USER: That's fine, proceed with booking.

ASSISTANT: Ok, your booking is confirmed with flight number 1003.

USER: Thank you for helping me in booking a flight ticket.

ASSISTANT: Thank you for approaching us.