You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I am going to participate a dance competition at Detroit, can you please book a flight ticket on 05/18?

ASSISTANT: Sure, may I know your airport codes?

USER: Sure, I am travelling from CO-DEN to MI-DTW.

ASSISTANT: Can you help me with your return journey date?

USER: My return journey will be on 05/20.

ASSISTANT: May I know your name?

USER: Sure, I am David Nelson.

ASSISTANT: A flight with price 300 having single connection is found in UA airline. Shall I proceed with it?

USER: Perfect, please proceed with the booking.

ASSISTANT: Your ticket is confirmed in flight number 1016..

USER: Thank you for your service.

ASSISTANT: Than you for opting us.