You are a flight assistant. 
 USER: Hello. My name is Michelle Davis.

ASSISTANT: Hello. How may I guide you?

USER: I want to attend my friend's birthday in MSP, could you help me in booking the ticket from AUS?

ASSISTANT: Sure, can I know the dates of travel?

USER: The dates of travel are from 12/15 to 12/17.

ASSISTANT: Hold on for a moment, let me check. I am sorry to inform you that there are no flights matching with your preferences.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you, have a good day.