You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Due to some emergency, I have decided to cancel the ticket. Can you please help me in cancelling the ticket?

ASSISTANT: Yes, I can help you.

USER: Thank you for accepting my request.

ASSISTANT: Can I know your name for checking?

USER: My name is Catherine Walker.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: It's ok, not a problem with that one. Anyways thank you for checking the ticket status.

ASSISTANT: Thank you for contacting our agency.

USER: You are welcome.