You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Patrick Mitchell. I would like to meet my relatives at LAX, can you please help me to book a flight from JFK?

ASSISTANT: Sure Mitchell, can you please help me with your dates of travel?

USER: Sure, my travelling dates are from 23 Apr to 25 Apr.

ASSISTANT: Please wait for a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry to say, there is no flight found as per your travelling details.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome.