вежливые просьбы и ответы на них в пропуски надо вставить подходящие по смыслу слова:
-Thanks for help.
-You are ..... .

Hello,my name is Dew.
-..... to meet you,Dew.

-..... you very much.
-It's a pleasure.

-I can help you with the task.
-Oh,it is very ..... of you to help me.