Hi. I am Karen Smith.
user
Hello, how can I help you today?
assistant
Could you please change my existing reservation as my exams got postpone?
user
Sure.
assistant
Thank you.
user
Please, wait for a while.
assistant
Sure.
user
Thank you for being patience, there is no reservation found on your name.
assistant
No problem, thank you for the information.
user
Thank you for contacting us.
assistant