You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I have cancelled my trip due to some health issues, can you please help me to cancel my past ticket.

ASSISTANT: Sure, We are here to help you. May I know your name?

USER: Thank you for your response. My name is Nicholas Anderson.

ASSISTANT: Give me a minute.

USER: Sure, I will wait for your reply.

ASSISTANT:  Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to cancel it.

USER: It's ok, not an issue with that. Thanks a lot for your assistance.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.