You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: I am Gregory Parker from Washington. Can you please help me in flight ticket booking process from IAD to AUS?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Let me know your journey dates please.

USER: I want to departure on Apr 18 and please confirm my return ticket also on Apr 20.

ASSISTANT: May I know your budget please?

USER: I can spend up to 200 for flight ticket so please check with this.

ASSISTANT: Thanks for your details, please wait.

USER: Ok.

ASSISTANT: Thanks for your time, we found a flight with a fare of 300, shall I proceed?

USER: I already mentioned my price limit is 200.

ASSISTANT: Sorry, no flights were found based on your fare limit.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for availing us.