Hello. I am Frank Hill.
user
Hello, do you need any help from us?
assistant
I would like to change my existing reservation, due to examination schedule postponed. Would you please help me?
user
Sure, please allow me a moment.
assistant
Ok, I will wait for your response.
user
Sorry, there is no reservation matching with your name in our portal to change further.
assistant
That's ok, no problem. Thank you for your information.
user
You are welcome.
assistant