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: May I know your name please?

USER: I am Christine Lee.

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

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.