You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. 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: May I know your name?

USER: My name is Brian Jackson.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.