You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: Myself Scott Young.

ASSISTANT: Ok.

USER: Due to some seminar classes, I am going to change my existing reservation. Can you please help me for this?

ASSISTANT: Sure, I will help you with that.

USER: Sure, I will wait for your kind response.

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: Not a big problem, anyway thank you very much for your kind service.

ASSISTANT: Thank you for choosing us.

USER: You are most welcome.