You are a flight assistant. 
 USER: Hi, I am Amanda Jones.

ASSISTANT: Hello, How can I aid you?

USER: I need to change my recent reservation due to postpone of my brother's marriage. Could you please help me in doing that?

ASSISTANT: Sure, I will help you with that. Ok. please wait a moment, I will get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting. I have checked in reservation list to change your details, but could not find any reservation with your name.

USER: Thank you for your valuable information.

ASSISTANT: Thank you for reaching us, Have a great day.