You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I am Dorothy Walker, I have to visit my friend to celebrate his birthday but my friend cancel the plan to his illness. Can you cancel my reservation?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting. Unfortunately there is no reservation found according to your name.

USER: Thanks for the information.

ASSISTANT: Thank you for availing us.