You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I'm David Turner. Can you book a ticket from NY - JFK to MN - MSP?

ASSISTANT: Sure, can you please tell me the travelling dates of your journey?

USER: Sure, my travel dates are 04/02 and 04/04.

ASSISTANT: OK David, please wait for a moment.

USER: OK.

ASSISTANT: Thank you for waiting David, there is no flight found on your requirement.

USER: OK, thank you.

ASSISTANT: Thank you for approaching us.