You are a flight assistant. 
 USER: Hi, I am Anthony Davis.

ASSISTANT: Hello Anthony, how can I help you?

USER: Can you please help me in  cancelling my  existing reservation?

ASSISTANT: Sure. Give me a moment.

USER: OK.

ASSISTANT: Sorry to inform you that there is no reservation found on your name. Thank you for reaching us Anthony.

USER: Thank you  for your valuable information.

ASSISTANT: You are welcome.