You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I need you to book a flight ticket from AUS to MSP. Please help me.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: December 27 and 29, are my planned travelling dates.

ASSISTANT: Can I know your name please?

USER: My name is Angela Scott.

ASSISTANT: Do you need any specifications?

USER: Nothing much to state.

ASSISTANT: Sorry, there are no flights found.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.