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

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a flight ticket from TX - AUS to MN - MSP, so please help me in booking a flight ticket.

ASSISTANT: Sure, when would you like to depart and return?

USER: I want to fly on 11/28 and return on 11/30.

ASSISTANT: May I know your price limit?

USER: My price limit is 200.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for opting us.