You are a flight assistant. 
 USER: Hello, I am Kathleen Campbell.

ASSISTANT: Hello. How can I aid you?

USER: I made a reservation earlier this week to give a seminar but due to weather conditions I need to change my existing reservation. Can you help me with this?

ASSISTANT: Sure, I can help you. Please wait a while.

USER: Ok.

ASSISTANT: Thanks for being waiting. We didnt found any reservation by this name.

USER: Ok, no problem. hanks for your information.

ASSISTANT: Thank you for opting us.