You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a ticket from Denver to Minneapolis & St. Paul, MN - MSP to visit Space center.

ASSISTANT: Sure, can you please share your origin?

USER: Ok. my origin airport code is CO - DEN.

ASSISTANT: May I know the travelling dates?

USER: Departure date is 01/01 and arrival date is 01/03.

ASSISTANT: Do you have any specifications?

USER: Make sure that price should be below 200.

ASSISTANT: Can please provide your name?

USER: Sure, my name is Steven Lee.

ASSISTANT: Please wait for a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: We found a flight with AA airlines, flight number is 1006 with one connection and price is 100. Shall I proceed?

USER: Ok, go ahead for booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thanks for choosing us.