You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I address you?

USER: I need to cancel my reservation as my plan to go for an adventure trip got cancelled. Can you please cancel my reservation made by name Sandra Clark?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Please  wait a while.

USER: Sure.

ASSISTANT: Thanks for being waiting, We didn't found nay reservation by this name.

USER: That's fine, thanks for your response.

ASSISTANT: Thank you for reaching us.