Leaving a long talker
A dealer has kept you for 25 minutes at an exhibition; you need to meet others.
They sayAnd another thing about the subsidy rules...
Strong replies
Rajesh ji, this has been really useful. I promised to see three stalls before lunch, so I will go. I will call you next week.
Let me introduce you to Sameer before I go; he knows the subsidy side well.
Why they work
They thank, give a true reason or a favour, and set a next step.
A weak reply
Hmm, hmm, while looking around for 10 more minutes. It is rude to both of you.