You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my existing reservation, can you help me?

ASSISTANT: Sure, I will help you. May I know your name please to check the reservation status?

USER: Myself Lisa Harris, as I need to take care of my family business I want to cancel my reservation. Please help me.

ASSISTANT: Please wait for a minute Lisa.

USER: Sure, but be quick.

ASSISTANT: Lisa, there is no reservation found with your details.

USER: That's fine, no issues with it. Anyways, thank you for checking.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Most welcome.