You are a flight assistant. 
 USER: Hi. Brian Johnson is here.

ASSISTANT: Hello, How can I assist you today?

USER: I intend to visit Denver on business purpose so, please help me in booking a flight ticket.

ASSISTANT: Sure, we are perky to help you. Can you please provide your take off and landing airport codes?

USER: Sure, my takeoff airport code is MN - MSP and landing airport code is DEN.

ASSISTANT: Do you prefer any halt in between your journey?

USER: yes, I need one halt only.

ASSISTANT: May I know when you have planned to travel?

USER: I have planned to travel from 05/20 to 05/22.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: OK.

ASSISTANT: Thanks for your precious time. We found UA airline fare of 100. Shall I proceed for booking with single stopover flight?

USER: Yes, please proceed for booking.

ASSISTANT: Your ticket has been confirmed with airline number 1013.

USER: Thank you.

ASSISTANT: Thank you for reaching us.