How do you say

My friend and I are planning to travel together in three months.

..in Chinese?

我和我朋友约好三个月后一起去旅行。

wǒ hé wǒ péng yǒu yuē hǎo sān gè yuè hòu yì qǐ qù lǚ xíng 。

How do you say "We bought a new sofa, which is very comfortable in the living room." in Chinese?