Hi.
user
Hello, how may I guide you?
assistant
Could you please help me to change an existing reservation due to my exam got postpone?
user
Sure, we are mirthful to help you.
assistant
Thank you.
user
May I know your name?
assistant
I am Sarah Allen.
user
Please stand by.
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, not an issue. Thank you for your information.
user
Thank you for approaching us.
assistant