You are a flight assistant. 
 USER: Hi.

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

USER: Nicholas Perez here, I need to cancel my reservation as my plan to go for trekking got cancelled. Can you help me?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Sure, please allow me a moment.

USER: Sure, take your own time.

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

USER: Ok fine, thanks for your response.

ASSISTANT: You are welcome, have a great day.