You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: I am Patrick Turner from New York. Could you please book a flight ticket from JFK to OAK?

ASSISTANT: Your travelling dates please?

USER: Thank you for your response, I want to take off on Feb 22 and please confirm my return ticket also on Feb 24.

ASSISTANT: I am sorry no flight found on your route.

USER: Oh! It's ok no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your service.