You are a flight assistant. 
 USER: Hi. I am Dennis Wilson.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to cancel my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry Dennis, there is no reservation found with your name in our records.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Most welcome.