第一句：Tony, could you give me a hand?
A: Tony, could you give me a hand?
A: I want to send a fax to Laura, but I don't knowhow to use the facsimile machine.
第二句：May I ask a favor of you?
A: May I ask a favor of you?
A: Can you tell me how to send a fax?
You might do me a favor?
Do you mind if I ask you a favor?