You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Melissa Nelson here.

ASSISTANT: Nelson, how can I assist you today?

USER: Can you cancel my recent reservation, which I have done 3 months back?

ASSISTANT: Sure, before that let me check your reservation status.

USER: Ok.

ASSISTANT: Sorry Nelson, I have not found any reservation by your name in our database.

USER: It's ok, not an issue for me. Thanks for checking.

ASSISTANT: Thank you for contacting us, have a nice day.