You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I want to change my existing reservation due to some technical issues. Can you help me with that?

ASSISTANT: Sure, I am here to help you out. Please provide me your name.

USER: Thank you. I am Raymond Scott.

ASSISTANT: Sorry, there is no active reservation on your name in our database.

USER: Ok, no problem. Thank you for your quick response.

ASSISTANT: Thank you for reaching us.