You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What can I do for you?

USER: I am Nancy Davis, I am unable to travel right now due to health issues so can you help me cancelling my recent reservation?

ASSISTANT: Sure, just a moment please.

USER: Ok, I will wait for your reply.

ASSISTANT: I am sorry no reservation found on name  Nancy Davis. Thank you for choosing us.

USER: Oh! It's ok, thank you for your services.

ASSISTANT: Most welcome.