Hello.
user
Hello. How may I assist you today?
assistant
Myself Anna Thompson, I am willing to change my existing reservation. Can you please help me for this?
user
Sure, I am here to help you, please wait for a minute.
assistant
Sure, I will wait for your response.
user
Thanks for your waiting, I could not find any reservation with your name in our database.
assistant
Not a big deal, anyway thank you very much for your kind service.
user
My pleasure.
assistant