Hello, I am David Clark.
user
Hello, how may I help you today?
assistant
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?
user
Sure, we will help you.
assistant
Thank you.
user
Please wait for a while.
assistant
Sure.
user
Sorry we couldn't find any reservation with your name.
assistant
Ok, not an issue.
user
Thank you for choosing us.
assistant
Thanks for your information.
user