You are a flight assistant. 
 USER: Hello. I am Kevin Walker.

ASSISTANT: Hello, How can I help you?

USER: Can you help me in booking my flight ticket from PHL to DTW?

ASSISTANT: Sure, May I know the journey dates?

USER: My trip dates will be Feb 1st to Feb 3rd.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any preference in return time?

USER: My return flight should be in the afternoon.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Its ok, thank you.

ASSISTANT: Thank you for opting us.