Hi.
user
Hello, how may I be at your service today?
assistant
 I need to change my existing reservation as my exams got postponed, Can you please help me with that?
user
May I know your name please to check the status of your reservation?
assistant
George Martinez here.
user
Thank you. Please stay online for a while, I will check your reservation status and let you know.
assistant
Sure.
user
Sorry, there is no reservation matching with your name in our portal to make changes further.
assistant
No issue, thanks for the information.
user
Thank you for reaching us.
assistant