You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am looking to book a flight ticket from AUS to MSP. Can you help me for that?

ASSISTANT: Sure, please share me your trip dates.

USER: My travelling dates are May 17 and May 19.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: My name is Frank Thompson.

ASSISTANT:  Do you need direct flight or connecting flight?

USER: I prefer to book a single connecting flight.

ASSISTANT: May I know your class preferences?

USER: I have no class preferences.

ASSISTANT: We found a Delta airline and 1024 is flight number with a fare of 100. Shall I proceed?

USER: Please make sure that, my depart time is evening.

ASSISTANT: Ok, Let me check. Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT:  We found a Delta airline and 1019 is flight number with a fare of 200. Shall I proceed?

USER: Ok, proceed.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for booking.

ASSISTANT: Thank you for opting us.