Hi.
Hello, how can I assist you?
Can you please help me to change my existing reservation?
 Sure, I can change your reservation right now. Before that I need to know your good name please?
Thank you for your response, I am Debra Lee.
We regret to inform you that there is no active reservation found on your name.
It's ok not a problem, thank you for checking.
Thank you for opting us.