Caroline: Can you pick up Laura from school today? 
Caroline: I need to stay longer at work... 
Tom: Ok. What time?
Caroline: 3 p.m. 
Tom: Hmm.. I won't make it at 3  sharp coz I'm still with the clients. 
Caroline: so, what time?
Tom:  3.30 if there's no traffic. 
Caroline: Ok, that should be fine. 
Caroline: Just text her about it, ok?
Tom: Ok. 
Caroline will stay at work until 3 pm. Tom is with clients, he will picl Laura from school at 3:30 pm. Tom will text Laura about it.