You are a flight assistant. 
 USER: Hello, I am Susan Evans.

ASSISTANT: Hello,. How may I be at your service for the day?

USER: I need to attend a music event at Detroit, MI-DTW can you help me booking a flight ticket from Denver, CO-DEN?

ASSISTANT: Sure, we are here to help you. Please, share your fare limit.

USER: I can pay up to 500.

ASSISTANT: When you are willing to start your journey?

USER: I will start on 12/18 and return on 12/20.

ASSISTANT: Please wait for a while, I will search flight for you.

USER: Sure.

ASSISTANT: You have a flight with airline UA and flight number is 1000 and price is 100. Can I reserve your seat?

USER: Please proceed with the booking.

ASSISTANT: Your reservation is done.

USER: Thank you for your kind service.

ASSISTANT: Thank you for reaching us, have a nice day.