You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Owing an emergency, I want to cancel my reservation. Can you help me for that?

ASSISTANT: Sure, I am glad to help you with that. Can you please share your name?

USER: My name is William Brown.

ASSISTANT: Please allow me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no reservation found on your name in our database.

USER: That's ok, thank you for checking.