Bella: Hi Tonia! You tried to phone me? Sorry my mobile was muted.
Tonia: No pro. Just wanted to confirm the invitation for tomorrow.
Bella: Thank you. We are looking forward to seeing you at last.
Tonia: Yes, it's going to be a great evening. Do you think you could come at 7:30 instead of 7:00?
Bella: But of course!
Tonia: Sorry about this change but it seems I have to baby-sit longer than I thought. Mary is down with a flu and their nanny cannot  be with them on Sundays.
Bella: Really no need to explain. Half an hour makes no much difference, does it?
Tonia: Thank you so much, Bella.
Bella: Don't mention it. Just lovely that we'll meet.
Tonia: So see you all tomorrow at 7:30!
Bella: CU
Tonia wants Bella to come at 7:30 instead of 7:00 tomorrow as she has to baby-sit longer.