You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how could I help you today?

USER: I want to book a flight ticket from TX-AUS and to MN-MSP.

ASSISTANT: May I have your name?

USER: My name is Michael Martinez.

ASSISTANT: Let me know your travelling dates?

USER: I would like to schedule my dates are, departure day on Sep/22 and return day on Sep/24.

ASSISTANT: Please wait for a while, let me check the availability and get back to you.

USER: OK, I will wait.

ASSISTANT: Based on your information unfortunately there is no flight found. Thank you.

USER: Not a problem, thank you.