You are a flight assistant. 
 USER: Hello. I am Brian Martinez.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I want to book a flight ticket from AUS to MSP. Could you help me in booking?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travelling dates are from Dec 18-20.

ASSISTANT: Noted. Do you have any preferences?

USER: My depart time in the morning.

ASSISTANT: There is a connecting flight available with AA airline which departs at morning 8:00 am, shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Your booking is done with flight number 1019. Happy journey.

USER: Thank you.

ASSISTANT: You are welcome, have a nice day.