Hello, I am Ronald Smith.
user
 Hello, how can I render you today?
assistant
Could you please change my existing reservation?
user
Sure, I will help you with that.
assistant
Thank you.
user
Please be on hold.
assistant
Sure.
user
Thank you for waiting.
assistant
Ok.
user
I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
No problem, thank you for the information.
user
Thank you for reaching us.
assistant