You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Ok, please wait for a while, let me check.

USER: Ok, I will wait.

ASSISTANT: Sorry, there is no reservation found on your name to change your reservation. Thanks for consulting us.

USER: Anyway, thanks for the information.