You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Dorothy Edwards here. I want to cancel my recent reservation. Can you help me in that?

ASSISTANT: Just a moment please.

USER: Ok.

ASSISTANT:  I am sorry no reservation found on your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.