You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Can you help me to book a flight ticket from DTW to SEA?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My travel dates are Apr 05 and Apr 07.

ASSISTANT: Ok, could I have your name please?

USER: I am Joseph Perez.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I prefer connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: I would like to return back in the evening time.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: No problem, thank you for the information.

ASSISTANT: You are welcome, have a great day.