You are a flight assistant. 
 USER: Hello,. I am Stephen Moore.

ASSISTANT: Hello, how can I render you today?

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 with that. Please wait a while.

USER: Thank you. Sure.

ASSISTANT: Thank you for waiting. x.

USER: Ok.

ASSISTANT: I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching us.