You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: As I am a doctor, I want to conduct a free Medical camp at New York, JFK. Can you please book a ticket from DEN?

ASSISTANT: It's my pleasure to help you. May I know your planned travel dates?

USER: My scheduled dates are June 23 and June 25.

ASSISTANT: Could you have help me with your name please?

USER: Sure, I am Patrick Roberts.

ASSISTANT: Sorry, there are no flights available on this route for the given dates.

USER: Ok, thank you for your service.

ASSISTANT: Thank you for reaching us.