We will need to cancel the meeting.
I'm sorry to tell you this.
We will need to postpone the meeting.
Is this OK with you?
We will call you to arrange a meeting.
Can you inform us if you received any further information?
I am writing to ask about your services.
Have you answered that email?
convenient
enquire
put off
call off
I regret to inform you this.
set up
replied to
let us know