Requests "Making and Responding"

When we want someone else do like what we want then we make a request. The following words and phrases are useful expressions of making and responding request. The sample phrases are arranged from formal to informal

A: Could I trouble/bother you to lend me $200?
B: (positive) Of course, it's no problem/trouble (at all).
B: (negative) It's impossible for me because I've only got $150.

A: Could you please take me to the airport tomorrow morning?
B: (positive) Certainly.
B: (negative) I wish I could, but I've got an appointment at 8:30.

A: Will you help me fix this error, please?
B: (positive) Sure. I'll be glad to.
B: (negative) I'm afraid I can't. I don't know anything about computers.

A: Would you mind letting me borrow your book?
B: (positive) No, not at all.
B: (negative) I'm sorry, but I need it for next week's exam.

A: I'd like you to pick up some oil on the way home, if you have time.
B: (positive) No problem.
B: (negative) I can't do that because I won't be back until 11:00.

A: How/What about cleaning your room today?
B: (positive) No sweat.
B: (negative) Sorry. I'm going out with Lucy.