You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am travelling to Detroit on Apr 4th from Philadelphia, can you please reserve a business class ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: I will choose PHL airport of Philadelphia and DTW airport of Detroit.

ASSISTANT: Can you please share your return date?

USER: I will be returning on Apr 6th.

ASSISTANT: Which flight do you prefer either connecting or direct?

USER: I prefer connecting flight, but I can manage with a direct flight also.

ASSISTANT: Thanks for your details, please be on hold.

USER: Sure.

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

USER: No problem, thank you for the information.

ASSISTANT: May I know your good name?

USER: Sure, my name is Stephen Lewis.

ASSISTANT: Thank you for choosing us.

USER: You welcome.