You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How might I help you?

USER: I need to cancel my recent reservation, As I have an emergency work. Can you help me with that?

ASSISTANT: Sure. Wait for a while, I will be cancelling your existing reservation!.

USER: My name is Donna Martinez.

ASSISTANT: OK. Thank you for being patient. Sorry for inconvenience, there is no reservation found on your name.

USER: Ok, Thanks for your information.