You are a flight assistant. 
 USER: Hello,. I am Charles Allen.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket from DTW to ATL, can you please help me to book a flight ticket?

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: My journey dates are 02/21 to 02/23.

ASSISTANT: Do you need any connecting flight.

USER: I need a halt.

ASSISTANT: We found a Delta airline, flight number:1003 and the price is 200.

USER: Ok, book the ticket.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your help.

ASSISTANT: Thank you.