please, if you please — used to make a polite request or affirm an offer

• Bitte tue das nicht mehr.

  Пожалуйста, больше так не делай.

  Tatoeba · wolfgangth · CC BY 2.0 FR

• Geben Sie mir das, bitte.

  Дайте мне это, пожалуйста.

  Tatoeba · Plusquamperfekt · CC BY 2.0 FR

you're welcome — acknowledgement of thanks

excuse me, sorry — request to repeat information

here you are — when handing something over to someone

OK then, well then, all right — indication of mock acquiescence to someone's apparent demanding attitudeредкое