You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you now?

USER: I am Carolyn Harris, I want to cancel my recent reservation. Can you help me?

ASSISTANT: Sure, I am here to help you. Sorry, there is no reservation found on your name.

USER: Thank you.

ASSISTANT: You are welcome, have a nice day.

USER: Not a problem. Thank you.

ASSISTANT: Welcome.