Hi.
user
Hello.
assistant
I am Mark Thomas.
user
Mark Thomas, how may I aid you?
assistant
I want to change my existing reservation due to postpone of my exams, so can you please help me with this?
user
Sure, please wait for a while.
assistant
Sure.
user
Sorry, no reservation is available by your name.
assistant
No problem, thank you for the information.
user
Thank you for reaching us.
assistant