You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I assist you for today?

USER: I want to cancel my recent reservation, due to same health problem. Can you help me?

ASSISTANT: I will try my best for serve you about your ticket cancellation.

USER: Thank you.

ASSISTANT: Can you please mention your name to check the reservation status in your name?

USER: Sure, I am Karen Nelson.

ASSISTANT: I am unable to help you Nelson because there is no active reservation under your name to cancel in our data.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: My pleasure, thank you for reaching out here. Hope you have a nice day.