You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: My name is Kevin Williams. I have a plan to meet my friend in Detriot. Can you help me for booking a flight ticket?

ASSISTANT: Sure Kevin, can I know the travel dates please?

USER: My travelling dates are from 10/01 till 10/03.

ASSISTANT: Could you please provide the airport codes?

USER: My travelling airport codes are from BOS to DTW.

ASSISTANT: Sorry, there are no flights available on your dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: Welcome.