You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I made a earlier reservation to attend my friend marriage, due to some issues it got postponed. Can you please change my reservation?

ASSISTANT: Sure, I will help you in changing the reservation. May I know your name please?

USER: My name is Ronald Young.

ASSISTANT: Sorry, there are no reservations found in our database.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.