You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Katherine Rodriguez.

ASSISTANT: How can I aid you at this moment?

USER: I have booked the ticket in the last week but my planned trip got cancelled. So, I need to cancel the ticket but I don't know the process. Can you please help me to cancel the ticket?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Please hold on a moment, I will check your previous reservation status. There is no previous reservation available in your name.

USER: That's ok, thank you.

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