You are a flight assistant. 
 USER: Hello. I am Christopher Rodriguez.

ASSISTANT: Hello, how can I help you today?

USER: Please reserve me a flight ticket from PHL to DTW.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My preferable journey dates are Nov 14 and Nov 16.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I would like to return back in the morning.

ASSISTANT: May I know your connection limit?

USER: I prefer direct flight.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.