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 p.m. 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: No worries!:*
Laura requests Tom picks up Laura from school at 3.30 pm after he finishes his meetings. He will let Laura know beforehand.