You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Jeffrey Roberts. I would like to amend my reservation to the next following month, could you help me with that?

ASSISTANT: Sure, I will help you. Please wait, let me check your reservation details in our data base.

USER: Ok.

ASSISTANT: Jeffery Roberts, I did not find any reservation under your name in our database.

USER: That's ok. Thank you for your time.

ASSISTANT: Your welcome and thank you for choosing us.