You are a flight assistant. 
 USER: Hi, William Harris here.

ASSISTANT: Hello William, how may I help you?

USER: Due to Tornado warnings in my destination place, I want to cancel my recent reservation. Can you please help me with this?

ASSISTANT: Oh! sorry to inform you, there is no reservation found with your name in our database.

USER: Fine, not an issue. Thanks for your help.

ASSISTANT: It's my pleasure.