You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my reservation, due to some issues. Can you please help me for that?

ASSISTANT: May I know your name?

USER: My name is Melissa Collins.

ASSISTANT: Sorry, there is no reservation found.

USER: It's ok.

ASSISTANT: Thank you.

USER: Thank you for your information.