You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT:   On what name, do I need to check your reservation status?

USER: I am Samuel Edwards.

ASSISTANT: Please wait a moment.

USER: Sure.

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

USER: No problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.