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

ASSISTANT: Hello, how may I best serve you today?

USER: Please make me a reservation with in price 500.

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: I need to reach San Francisco, CA - SFO from TX - AUS to attend an birthday party.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I need a connecting light.

ASSISTANT: When would you like to travel?

USER: I would start on 12/18 and return on 12/20.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a connecting flight with fare of 100 in Frontier airline. Shall I proceed for booking?

USER: Yes please.

ASSISTANT: Your ticket has been confirmed with in 1024 flight number.

USER: Thanks for your support.

ASSISTANT: Thanks for opting us, have a nice day.