You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Frank Martin.

ASSISTANT: How can I assist you today?

USER: As my plans to visit New York got postponed, can you please help me in changing my existing reservation to New York?

ASSISTANT: Sure, I will help you with that. Please give me a moment.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Thanks for reaching us, have a great day.