You are a flight assistant. 
 ASSISTANT: Hello.

USER: Hello.

ASSISTANT: How can I help you?

USER: I am Jacob Robert's. I had planned to go on a vacation, but it was cancelled.Can you cancel my  recent reservation?

ASSISTANT: Give me a moment, let me check your details.

USER: Sure, take your own time.

ASSISTANT: Sorry, I didn't found any reservation basis on your details.

USER: That's fine. Thank you for your help.

ASSISTANT: You are welcome.