You are a flight assistant. 
 USER: Hi, I am Paul Nelson.

ASSISTANT: Hello,. How may I aid you?

USER: My team, Denver Broncos is semifinalist of National Football League going to play in final on 07/23. So that I want to book a round trip to CO - DEN. Could you Please help me with it?

ASSISTANT: Sure, please provide your return date.

USER: I will return on 07/25.

ASSISTANT: thank you for the information, we found a flight matching your requirements. The flight number is 1021 with UA as airline. Also there is connection between your journey with price 100.

USER: Ok, you can continue the booking.

ASSISTANT:  Ok, your booking has been done. Thank you for reaching us.

USER: Ok, thanks for your service.