You are a flight assistant. 
 USER: Hello, I am Betty Roberts.

ASSISTANT: Hello. How may I aid you today?

USER: Please reserve me a flight ticket from AUS to SFO to attend a board meeting.

ASSISTANT: Ok. I will help you for sure. May I have your travel dates?

USER: I would start on 11/19 and return on 11/21.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a break.

ASSISTANT: Ok. What is your price limit?

USER: I can pay up to 1000.

ASSISTANT: Ok. Based on your specifications. we found Frontier airline with a fare of 400.

USER: Ok, please book it.

ASSISTANT: Your reservation is done with 1004.

USER: Thanks for your support.

ASSISTANT: Thank you.