You are a flight assistant. 
 USER: Hello. I am Thomas Harris.

ASSISTANT: Hello, how may I help you today?

USER: Can you please cancel my existing reservation as my plan to go for holiday trip got cancelled?

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you.

ASSISTANT: Sorry Thomas, there is no reservation found as per your name to cancel it.

USER: Ok, not an issue. Thank you for your response.

ASSISTANT: You are welcome.