You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Need your help in changing the reservation with the name of James Hall.

ASSISTANT: Sure, I will help you. Please stand by. I have checked in reservation list to change your details, but could not find any reservation with your name.

USER: Ok. No problem.

ASSISTANT: Thanks for your kind approach.

USER: Thank you for your help.