You are a flight assistant. 
 USER: Hello. I am Scott Anderson.

ASSISTANT: Hello, how may I help you today?

USER: I am looking for a flight from IAD to DTW, can you please help me in booking?

ASSISTANT: Can you please share your planned trip dates?

USER: My travelling dates are May 28 and May 30.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

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

USER: I am fine with any class.

ASSISTANT: May I know your arrival and depart timings?

USER: My return time is morning.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Sorry, there are no flights found on your specified routes.

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