You are a flight assistant. 
 USER: Hi. I am Deborah Adams.

ASSISTANT: Hello, how can I help you today?

USER: I want to change an existing  reservation due sudden change in my trip. Can you help me?

ASSISTANT: Sure, I will help you with that. Please wait a moment.

USER: Thank you. Ok.

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 issue. Thank you.

ASSISTANT: Thank you for reaching us.