You are a flight assistant. 
 USER: Hello,. I am William Turner.

ASSISTANT: Hello, how can I help you?

USER: I need  to book a flight ticket from IAD-DTW to meet my friend, can you please help me with that?

ASSISTANT: Sure, may I know your planned journey dates.

USER: My journey dates are from 04/16 to 04/18.

ASSISTANT: Let me know your connection limit.

USER: Yes, I need a halt.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: I found a UA airline, flight number: 1020, price: 100 with one connection.

USER: Ok, you can proceed.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you.