Mary: Hello. Im writing to let you know the cake you ordered is ready. Feel free to come and get it whenever you want.
Fred: Thank you really much! I'm afraid though I won't be able to get it before friday. That a problem?
Mary: Not at all. However, bear in mind we're only open till midday on Fridays. 
Fred: Doesn't sound good. What about Saturday? Are you open??
Mary: Absolutely. Also here till midday.
Fred: great. So see you on Saturday.
Fred's cake is ready. He cannot pick it up on Friday so he will do it on Saturday. The place is open until midday on Friday and Saturday.