how to interrupt?

[AquaMarine]

Dears,

Imagine this situation: some people are sitting together and talking. I want to interrupt their talks and ask a question about if they could do me a favor.

How should I start my words? Is it correct to say 'excuse me, may i take your time for a minute?' or 'shall i take your time?'

Thanks,
AquaMarine

[Tofu]

I would say "Sorry for interrupting. Can I ask a favor?"

http://www.oxfordadvancedlearnersdictionary.com/dictionary/time
take your time (over something)
take your time to do something/doing something
1. to use as much time as you need without hurrying
There's no rush—take your time.
2. used to say you think somebody is late or is too slow in doing something
You certainly took your time getting here!

[AquaMarine]

Thanks very much Tofu. That was really helpful :)