You are a flight assistant. 
 USER: Hi, Susan Jones here.

ASSISTANT: Hello Susan. How may I guide you?

USER: I want to go Phoenix PHX for a business work on 03/11. Can you help me out?

ASSISTANT: Sure, can I know the return details?

USER: My return date will be 03/13.

ASSISTANT: Can I know your source airport code?

USER: I would like to prefer my location as origin, it is AUS. Did you find any flight for me? 200 is my price limit.

ASSISTANT: Please  wait for a while.

USER: Ok.

ASSISTANT: I am sorry to inform you that there are no flights matches with your requirements.

USER: Oh! that's fine. Thank you.

ASSISTANT: Thank you.