You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Lisa Wright. I am planning to book a ticket from JFK to AUS. Can you please book a ticket for me?

ASSISTANT: Sure, may I know your price limit to search for the flight?

USER: My travelling dates are 06/18 and return on 06/20. My price limit is 200.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights were found for your details.

USER: That's fine.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your help.