You are a flight assistant. 
 USER: Hello, I am Brian King.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket from WA-SEA to MI-DTW, can you please help me in that?

ASSISTANT: Sure, can you please provide your travel dates?

USER: My travelling dates are from 02/05 to 02/07.

ASSISTANT: Please wait for a while, I will check and revert you.

USER: Ok.

ASSISTANT: Sorry there were no flights found matching your preferences.

USER: Ok, no issues. Thanks for your kind information.

ASSISTANT: Thank you for reaching us, have a good day.