You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Jack Walker. I would like to travel from LAX to DTW to meet my friend. Can you help me for booking a flight ticket?

ASSISTANT: Sure, may I know your preferable travel dates please?

USER: My travelling dates are 02/15 and 02/17.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome.