You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you the day?

USER: I am planning to visit a Central Park at New York due to some issues it was postponed, so can you help me with changing my existing reservation?

ASSISTANT:  Sure, I am here to serve you. Please mention your name to proceed to next step?

USER: My name is Kenneth Miller.

ASSISTANT: Ok, please wait for a minute. I will revert to you.

USER: Sure, I will wait.

ASSISTANT: Thank you for the patience. We did not find any reservation that matches with your name.

USER: Not an issue. Thank you for your response.

ASSISTANT: Thank you for approaching us, regarding ticket changing procedure.