Write an email in reply

Hi Harriet,
It was great to hear from you. I'm so excited to know it's sunny next Saturday and luckily I'm free at 2 pm, so I'm ready to go with you.
I prefer having a picnic to going on the boating lake as I don't know how to swim. I think it would be interesting with the camps, food and green grass. Coming back home after that is too early, hence I suggest we go shopping. How about you?
I have completely reviewed all the lessons, thus don't worry about my free time, just enjoy.
Hope to see you soon,
Lucy