+0

A: I am here to meet John.

Receptionist: May I ask what the purpose of the meeting is?

A: I have to demonstrate our product to him after scheduling the appointment.

Please check the conversation.

+1

For example:

kumenglishA: I'm here to meet John.
Receptionist: May I ask what the purpose of the meeting is?
A: I'm here to demonstrate our product to him. I have an appointment.
or A: I have an appointment to demonstrate our product to him.