You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Let me know your name.

USER: My name is Anthony Baker.

ASSISTANT: Sorry, no reservation found by your name.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you.