You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Recently I made a reservation to enjoy my trip, due to some reasons it got postponed, so I need to change my reservation. Can you please help me out?

ASSISTANT: May I know your name?

USER: I am Amy Parker.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.