You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I abet you?

USER: Myself Donna Nelson. Can you please help me with changing my reservation?

ASSISTANT: Sure, I am here to help you. Please give me a moment.

USER: Sure, take your time.

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

USER: Oh! It may not be booked properly due to server issue. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing us.