You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to book a ticket from SFO to DTW, can you please help me out?

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

USER: I am travelling on these dates May 4th and 6th.

ASSISTANT: Do you have any connection limit?

USER: I need single connected flight.

ASSISTANT: Any other requirements to be met?

USER: I prefer business class.

ASSISTANT: May I know your good name?

USER: Angela Nelson here.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.