You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Edward Martin. I like to change my reservation due to my brother engagement, can you help in that?

ASSISTANT: Sure. Let me check your details. No reservation found on your name. Sorry.

USER: That's ok.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your help.