You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Richard Walker here, I want to meet my friend in Denver DEN from DTW, so I want to book my ticket.

ASSISTANT: Ok, can you provide me dates you preferred?

USER: Sure, my travel dates are 10/03 to 10/05.

ASSISTANT: Please, wait a moment.

USER: Sure.

ASSISTANT: We found a flight on your codes and dates you preferred.

USER: Ok, book my ticket please.

ASSISTANT: Your ticket has been booked, your flight number is 1008 with AA airline.

USER: Thanks for helping me.

ASSISTANT: Thank you.