You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Stephen Adams. I am planning to visit Millennium Park at Chicago, could you please help me with booking a flight ticket?

ASSISTANT: May I know your trip dates?

USER: I would like to take off on 09/25 and return on 09/27.

ASSISTANT: Please help me with your airport codes?

USER: My source airport code is LAS and destination airport code is ORD.

ASSISTANT: There is a flight with flight number 1000 with price is 100 and number of connections 1, can I proceed booking?

USER: Please confirm the booking.

ASSISTANT: Your booking is done in Frontier airlines.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Most welcome.