Hello, I am Steven Smith.
Hello Smith, how can I aid you?
I need to change my existing reservation. Could you please help me to change my reservation?
Sure, I can do that for you. Please wait, I will check your reservation status and get back to you.
Sure, I will wait for your response.
Smith, I have not found any reservation under your name in our database.
Not a big problem, thank you very much for checking the status.
You are welcome and thank you for contacting us.