You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Raymond Evans.

ASSISTANT: How may I assist you?

USER: I would like to book a flight ticket from DTE to SFO, can you please help me to book a flight ticket?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My travelling dates are Feb 09 and Feb 11.

ASSISTANT: May I know your connection limit please?

USER: My connection limit is 1.

ASSISTANT: Can you please recheck your origin airport code?

USER: My source location is DTW.

ASSISTANT: Please share if you want to travel in any specific time?

USER: My departing time is morning.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Raymond Evans, there are no flights available in your route.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.