Hello.
user
Hello. How can I aid you?
assistant
I want to change my existing reservation, due to bad weather conditions. Can you please help me to make some modifications?
user
Sure, We are here to help you. May I know your name?
assistant
Sure, my name is Mary Williams.
user
Give me a minute.
assistant
Sure.
user
  Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to change it.
assistant
Ok, thanks for your information.
user
Thank you for choosing us.
assistant