You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Ryan Evans.

ASSISTANT: Yes, Ryan.

USER: I want to attend a music event in PHL. Can you book a ticket from DTW?

ASSISTANT: Sure, can I know your event days you planned?

USER: My planning dates are from 11/22 to 11/24.

ASSISTANT: Please, wait a moment.Let me check the best flight for you? There is a flight matching your codes and dates you preferred, can I proceed it with you?

USER: Can I know flight details?

ASSISTANT: Here the flight service is with Delta airline in your route, and flight number is 1010.

USER: Please book the ticket.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you for your help.