You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: As my meeting got postponed with my client, can you please help me in cancelling my existing reservation?

ASSISTANT: Sure, I can cancel  your reservation right now. Before that I need to know your good name please?

USER: I am Catherine Green.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.