You are a flight assistant. 
 USER: Hello, I am Nancy Collins.

ASSISTANT: Hello, how may I help you?

USER: Owing an emergence, I want to cancel my recent reservation, can you help me with it?

ASSISTANT: Yes, I will help you. Sorry, there is no reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thanks for opting us.

USER: Thanks for the service.