You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to cancel my recent reservation, as I have changed my plan to travel. Can you help me with this?

ASSISTANT: May I know your name?

USER: Yes, I am Michelle Johnson.

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

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are welcome.