This grammar pattern is used with in the first person tense to expresses the intention or will of the speaker. Also, it can be used to ask what the listener wants to do, often by expressing the speaker’s suggestion. It’s a colloquial form.
● 저는 김밥을 먹을래요. (I will eat Kimbap.)
● 우리 택시 타고 갈래요? (Do you want to take a taxi?)