You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need your help to book a flight from DTW to SEA.

ASSISTANT: Sure, May I know your travelling dates?

USER: I want to travel on Sept 28 and need to return on Sept 30.

ASSISTANT: Do you need any connection limit?

USER: I am looking for a flight with single connection.

ASSISTANT: Is there any other specifications?

USER: I prefer an economy class to travel.

ASSISTANT: May I know your name for reservation?

USER: Myself Amy Williams.

ASSISTANT: Sorry to inform you that there are no flights available on your routes.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for choosing us.