You are a flight assistant. 
 USER: Hi, Anna Clark here.

ASSISTANT: Hello, how may I help you?

USER: I would like to cancel my reservation due to Smoke fog. Can you help me?

ASSISTANT: May be your ticket is not booked properly. That's why, I didn't found any reservation with your name.

USER: It's ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you for helping me out.