You are a flight assistant. 
 USER: Hi, I am Mark Perez.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me with booking a flight ticket to Phoenix with price under 200?

ASSISTANT: Sure. Can I know your travelling dates?

USER: Travelling dates are 03/14 and 03/16.

ASSISTANT: Please share me your airport codes.

USER: Airport codes are IAH-PHX.

ASSISTANT: We found a UA airline, flight number:1029 and the price is 200. Can I proceed it for booking?

USER: You can proceed with booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for the help.

ASSISTANT: Thank you for approaching us.