Next now i'll fly to london.i stay with my pen friend.they'll meets me at the airport.my pen friend is introducing me to his family.найти нужно ошибку в предложениях

Next (!)week I'll fly to London.(!)I'll meet with (!)my pen friend.They'll meet(!) me at the airport.My pen friend will introduce(!) me to his family. (!)I phone my mum and (!)will say (!)that I am OK.My host family will show(!) me my room.