Hello, I am David Clark.
Hello, how may I help you today?
I would like to change an existing reservation as I am planning to meet my grand patents got post pone due to my health issues. Can you help me to change an existing reservation?
Sure, we will help you.
Thank you.
Please wait for a while.
Sure.
Sorry we couldn't find any reservation with your name.
Ok, not an issue.
Thank you for choosing us.