You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Cynthia Jones, I want to attend for a Beer festival in DTW. Can you please help me for booking from SEA?

ASSISTANT: Can I know your desired travel dates please?

USER: Sure, my desired journey dates are 31 Dec and 2 Jan.

ASSISTANT: Please wait a while.

USER: Make sure that my depart time is evening.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for opting us.