You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Due to heavy rains I want to cancel my reservation, can you help me?

ASSISTANT: Sure, may I  know your name?

USER: My name is Karen Williams.

ASSISTANT: Sorry Williams, there is no reservation found with your name in our database.

USER: Not an issue. Thank you for checking.

ASSISTANT: My pleasure.