You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: Ronald Rodriguez here. I want to cancel my recent reservation due to some changes in my plans. can you help in that?

ASSISTANT: Sure, please allow me a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation with your name in our portal to cancel further.

USER: Ok, not an issue. Thank you.

ASSISTANT: You are welcome, have a great day.