You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER:  I have to cancel my flight ticket that I unable to travel to meet my sister that she came to meet me, can you help me in that one?

ASSISTANT: Sure, may I know your good name please?

USER: Sure, my name is Jerry Smith.

ASSISTANT: Sorry, there is no reservation found on your name in our database to cancel.

USER: Ok, that's fine.

ASSISTANT: Thank you for approaching us.

USER: Anyways, thank you for your service.