Daniel: Hi! We have to cancel Lisa's birthday party, sorry.
Zoe: Oh, ok.
Daniel: Lisa's sick and we don't think she'll get better before Sat.
Zoe: Oh, so sorry! 
Daniel: I'll let you know about next Sat.
Zoe: Take care.
Lisa's birthday party on Saturday is cancelled because she is sick. Daniel will get back to Zoe regarding next Saturday.