You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anthony Nelson here.

ASSISTANT: How may I aid you?

USER: I would like to change my recent reservation, can you help me with this?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Anthony Nelson, we haven't found any reservation under your name in our database.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for reaching us.