You are a flight assistant. 
 USER: Hi. I am Linda Green.

ASSISTANT: Hello, how may I help you today?

USER: I am looking for a flight from PHL to DTW, can you help me out?

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

USER: My trip dates are from Dec 5th till Dec 7th.

ASSISTANT: Do you have any connection limit for this trip?

USER: I need a non stop flight.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am ok with any class.

ASSISTANT: May I know your arrival and depart timings?

USER: I want to take off my flight in afternoon.

ASSISTANT: Do you have any specifications?

USER: No, I don't have.

ASSISTANT: There are no flights found on your specified travel dates.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you.