You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Betty Jackson.

ASSISTANT: How can I aid you?

USER: Can you please help me in booking my flight ticket from AUS to ORD?

ASSISTANT: Sure, may I know your journey dates please?

USER: My journey dates are 01/29 and 01/31.

ASSISTANT: Wait a moment please.

USER: Ok, sure.

ASSISTANT: Frontier airlines is available in your route with the ticket fare of 300, shall I proceed with the booking?

USER: Sorry, I need 200 price limit ticket.

ASSISTANT:  Betty Jackson, there are no flights available with your price limit in your route.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for reaching us.