You are a flight assistant. 
 USER: Hello,. I am John Thompson.

ASSISTANT: Hello, how may I render you today?

USER: I would like to visit MGM Grand in Las Vegas, LAS, can you please book a flight ticket for me?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: May I know your nearest airport code?

USER: Detroit, DTW is my nearest airport, so I want to start from here.

ASSISTANT: Ok, may I know when would you like to travel?

USER: I would like to travel on 03/19 and arrival on 03/21.

ASSISTANT: Do you have any class preferences?

USER: I am comfortable to travel with any class.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: We are glad to inform you that, here is a flight 1021 available in Spirit airline with an economy class. Shall I confirm it?

USER: Ok, proceed with booking.

ASSISTANT: Your booking has been confirmed with a halt and fare is 200.

USER: Thank you for booking my flight ticket.

ASSISTANT: Thank you for reaching us.