You are a flight assistant. 
 USER: Hello, I am Charles Anderson.

ASSISTANT: Hello, how can I help you?

USER: Owing an emergence, I want to cancel my recent reservation. Can you help me with it?

ASSISTANT: Sure, Please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, we found your reservation. Shall I proceed it for cancelling?

USER: Yes, you can proceed with cancellation.

ASSISTANT: Your reservation is cancelled successfully.

USER: Thanks for the help.

ASSISTANT: Thanks for choosing our service.