You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Due to a sudden meeting at office with my client on my boarding day, I want to cancel my recent reservation. Can you help me with cancellation?

ASSISTANT: Sure, please stand by. Can you please provide your name?

USER: Sure, you can check my reservation on the name of Dennis Anderson.

ASSISTANT: I am sorry to inform that there is no reservation on your name.

USER: Ok, thanks for your assistance.

ASSISTANT: Thanks for approaching us.