You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Patrick Hernandez, can you help me with booking ticket from IAH to ORD?

ASSISTANT: Sure, can you please specify me your dates of travel?

USER: Ok, my travel dates are from 09/19 and 09/21.

ASSISTANT: Do you have any class preferences?

USER: Yes, price should not exceed than 200. I am ok with any class.

ASSISTANT: There is a connecting flight 1015 of AA airlines with price 100, shall I book it?

USER: Proceed with booking.

ASSISTANT: Your booking is done, have a safe trip.

USER: Thanks for your support.

ASSISTANT: Welcome.