You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Jessica Perez.

ASSISTANT: How can I aid you?

USER: I have a conference meeting at Chicago. Can you please help me in reserving the ticket from DTW to ORD?

ASSISTANT: Sure, can I know the travel dates please?

USER: I am planning my trip on May 10, and again I will return back on May 12.

ASSISTANT: Could you please provide the departure and return time?

USER: My depart and return time should be in evening.

ASSISTANT: Do you have any requirements?

USER: I am flexible with single connection, and my class preference is economy.

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

USER: Not a big issue, anyhow thank you very much for your service.

ASSISTANT: Thank you for approaching us.

USER: You are welcome.