You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Few days back I have booked a ticket to visit my uncles house, but, suddenly they went to their home town. So, I want to cancel my ticket, could you help me?

ASSISTANT: Ok, please tell me your name?

USER: My name is Barbara Carter.

ASSISTANT: Sorry Barbara, no reservation found by your name. Can I help you with anything else?

USER: It's not a problem, thanks for providing the information.

ASSISTANT: Thank you for reaching us.

USER: No, that's it. Welcome.

ASSISTANT: Have a good day.