A: Hi Sam, hope you don't mind me dropping in unannounced. 

B: Not at all, come on in. 

A: I was just passing by and thought I'd take the opportunity to invite you over on Friday evening. I'm having another barbecue followed by a few drinks by the pool. 

B: How can I resist an offer like that? Would you like to stay for coffee?

A: I'd better run, but thanks all the same. Oh, before I go, there's just one thing. Could you not bring your dog this time?

B: But Charlie and I go everywhere together. 

A: I know, but remember last time? He knocked over the barbecue while chasing my cat, and then did his business in the pool. 

B: OK, if you insist.