You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Perez.

ASSISTANT: How can I assist you at this moment?

USER: Can you help me in cancelling my reservation?

ASSISTANT: Sure Sarah Perez, I will help you with that. Please wait a moment and I will check your reservation status.

USER: Sure.

ASSISTANT: Sorry Sarah Perez, no reservation has found under your name to cancel.

USER: No issue, thank you.

ASSISTANT: My pleasure. Thank you for choosing us, have a great day.