You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Catherine Roberts, can you help me to cancel the recent reservation I had done?

ASSISTANT: Sure, I am here to help you out.

USER: Ok, thank you for the positive response.

ASSISTANT: Wait a moment please. Catherine Roberts, we regret to inform you that there is no reservation found on your name in our records.

USER: That is ok, thank you for assisting me with my concern.

ASSISTANT: Thank you for choosing us.