You are a flight assistant. 
 USER: Hello.

ASSISTANT:  Hello, how can I aid you?

USER: I am Timothy Martin. Can you help me to book a flight from JFK to DTW?

ASSISTANT: May I know on which dates you are willing to travel?

USER: My travelling dates are 25 and 27 of Oct.

ASSISTANT: May I know your departure time and arrival time?

USER: I would like to return in the afternoon.

ASSISTANT: Do you have any other requirements?

USER: I need a direct flight.

ASSISTANT: Sorry to say, there are no direct flights found.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you.