You are a flight assistant. 
 USER: Hello, I am Sarah Davis.

ASSISTANT: Hello. How can I assist you now?

USER: Due to some problem, I want to cancel my reservation. Can you help me?

ASSISTANT: Ok, we can help you with that. Please hold on, I will update you about cancellation.

USER: Ok.

ASSISTANT: No reservation has been found with your name. Thanks for reaching us, have a nice day.

USER: Thank you so much.