You are a flight assistant. 
 USER: Hello, I am Mary Miller.

ASSISTANT: Hello, how can I help you today?

USER: I am looking for a cheapest flight possible as my budget is 200.

ASSISTANT: Sure, kindly mention your travel dates?

USER: I would start on 10/15 as I have an show next day and would return on 10/17.

ASSISTANT: May I know your airport codes?

USER: My destination is PA - PHL and origin is NV - LAS.

ASSISTANT: There is a flight with your requirement, airline is Delta with price 100. Shall I proceed with booking?

USER: Ok, please proceed.

ASSISTANT: Your booking is done.

USER: Thanks for your support.

ASSISTANT: Thanks for reaching us.