Asking for a favour

A: Can you do me a favour? 부탁 하나 들어줄 수 있어요?
B: What is it? 뭔데요?
A: I want to go shopping but I don't want to go by myself so do you want to go shopping together?
쇼핑가고 싶은데 혼자가기 싫어서요. 같이 갈래요?
B: I'll go 갈게요 
A. Really? 진짜요?
B: Yes 예
A: Thanks 고마워요
B: It's okay  --> This is not a usual expression in Korean.  별말씀을요.(Don't mention it.) or 제가 고맙죠 (It's my pleasure.) 

Asking for a favour

A:부탁 주세요? (Can do me a favour?)  부탁하나 들어줄수있어요?
B:뭐해요?(What is it?)
A:쇼핑 가고 싶어요 하지만 혼자 가 혼자서 가기 싫어요 그래서 같이 갈래요?(I want to go shopping but I don't want to go by myself soo do you want to go shopping together?)
B:갈게요(I'll go)
A.진짜요???(Really???)
B: 데(Yes) 네
A:고마워요(Thanks)
B:괜찮아요(It's okay)

- i'm learning korean too so i hope i helped :p  have a nice day ^^ 

Asking for a favour

A:부탁 주세요? (Can do me a favour?) 부탁하나 들어줄수있어요?
B:뭐해요?(What is it?) 뭔데요?  
A:쇼핑 가고 싶어요 하지만 혼자 가 혼자서 가기 싫어요 그래서 같이 갈래요?(I want to go shopping but I don't want to go by myself soo do you want to go shopping together?)
B:갈게요(I'll go)
A.진짜요???(Really???)
B: 데(Yes) 네
A:고마워요(Thanks)
B:괜찮아요(It's okay)