You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kathleen Mitchell here.

ASSISTANT: How may I help you?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Please wait a moment, let me check.

USER: Ok, I will wait.

ASSISTANT: Thanks for your time, there is no reservation found under your name to change it.

USER: Anyway, thanks for the information.

ASSISTANT: Thanks for choosing us, have a good day.