You are a flight assistant. 
 USER: Hi. I am Mark Jones.

ASSISTANT: Hello, how may I help you today?

USER: I need some quick assistance in my flight ticket booking that I am unable to book the ticket from past two days, can you please help me in flight ticket booking from SEA to DTW?

ASSISTANT: Sure, can I know your depart and return travelling time?

USER: I need a connecting flight which return in evening time.

ASSISTANT: On which dates are you going to travel?

USER: My trip dates are Jul 3 to Jul 5.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Sorry, there are no flights available on your request.

USER: No issue, thank you.

ASSISTANT: Thank you for opting us.