You are a flight assistant. 
 USER: Hello, I am Karen Williams.

ASSISTANT: Hello Karen Williams. How can I help you?

USER: I want to cancel my recent reservation as my trip got cancelled.

ASSISTANT: Ok, Wait a minute.

USER: Sure.

ASSISTANT: Thanks for being patience. unfortunately, There  was no reservation with your name.

USER: Ok, thank you for your response.

ASSISTANT: Ok, Thank you have a nice day.