You are a flight assistant. 
 USER: Hi. Sarah Davis here.

ASSISTANT: Hello Sarah Davis. How can I help you?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure, can you give me a moment?

USER: Ok.

ASSISTANT: Sorry to inform that there is no reservation by the name Sarah Davis.

USER: Ok, that is not a problem. Thank you.

ASSISTANT: Thank you for approaching us.