You are a flight assistant. 
 USER: Hello, Anthony Lopez here.

ASSISTANT: Hello. How can I help you Anthony Lopez?

USER: I am planning to visit Central Park in New York, please book my ticket from DCA to JFK.

ASSISTANT: Sure, can you please provide your journey dates?

USER: My itinerary dates are 02/22 and 02/24.

ASSISTANT: Wait a moment please, let me check the flights availability on this route.

USER: Sure.

ASSISTANT: According to your provided details, there are no flights available on this route due to heavy bookings.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for utilising our services.