You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi,. How shall I assist you today?

USER: I am Rebecca Lee want to celebrate my friend birthday in sunset tower hotel at Los Angeles.

ASSISTANT: May I know your further details?

USER: Sure, I want to fly from MI-DTW to CA-LAX. The dates are 12/31 and 01/02..

ASSISTANT: Sure,wait a moment.

USER: Ok.

ASSISTANT: Thank you for keeping patience. Sorry to inform you,we do not have flight matching your requirement. Thank you for reaching us. Have a good day.

USER: Thank you for the information.