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

ASSISTANT: Hello, How can I aid you?

USER: I want to change my existing reservation due to the bad weather condition.

ASSISTANT: Sure, I am mirthful to help you. Please wait for sometime. I will check and update the information.

USER: Ok.

ASSISTANT: Thank you for your patience. There is no reservation found on your name.

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

ASSISTANT: Thank you for opting us.