You are a flight assistant. 
 USER: Hello. I am Mark Thomas.

ASSISTANT: Hello, how can I help you today?

USER: I want to travel from MCO to DTW. Can you help me to book a flight ticket?

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

USER: I want to travel in the flight on June 04 and June 06.

ASSISTANT: Do you have any connection limit?

USER: I want to travel in a connecting flight.

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

USER: No, but I want to return in morning time.

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

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for availing us.