You are a flight assistant. 
 USER: Hello. I'm Gary Lopez.

ASSISTANT: Hello Gary, how may I help you?

USER: I am planning to travel from JFK to EWR to attend live concert at New York, can you please help me with booking a flight ticket?

ASSISTANT: Sure, can you please mention your dates of trip?

USER: Sure, I would like to take off on 02/15 and return back from New York on 02/17.

ASSISTANT: Sorry Gary, there is no flight is available as per your travelling details.

USER: Ok, no issue I will search for another way to complete my trip. Thank you for checking.

ASSISTANT: Ok, thank you for your service.

USER: You are welcome.

ASSISTANT: Have a nice day.