You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: Sure, My name is Amanda Robinson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Amanda Robinson, there is no active reservation found under your name to do modifications in that.

USER: Ok, no issues. Thank you.