You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Edward Thompson here.

ASSISTANT: What assistance do you need from us?

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

ASSISTANT: Sure, I am here to help you with that. Can you please wait a minute?

USER: Ok, I will wait.

ASSISTANT: Sorry to inform you, there is no reservation found with your name in our database.

USER: Anyway, thanks for the information.

ASSISTANT: You are welcome. Have a nice day.