You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Donald Hall here. I want to meet my father-in-law, could you book my ticket from JFK to DTW?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are 01/22 and 01/24.

ASSISTANT: Sorry, there is no flight available as per your request.

USER: No problem, thank you.

ASSISTANT: Most welcome.