もう一同お願いします、ゆっくりお願いします*
you should know that one by heart by now
actually just ゆっくりお願いします** would be enough
*mou ichidou onegai shimasu, yukkuri onegai shimasu
once again please, slowly please
**yukkuri onegai shimasu
slowly please
without hearing what they're saying to you, i can't really help.
bring a recorder and post it here, might be interesting for people outside of japan to hear.
one thing i pops into my mind...
ポイントカードあります? pointo kaado arimasu ka?
"do you have a point card?"
if yes, ”はい、あります。” "hai, arimasu!" "yes, i've got one."
if no, ”ないです。” "nai desu." "no, i don't have one."