Hi, can I ask you something?

Of, course you can. What's on your mind?

I'm not sure I should tell you, actually.

I can't help if you don't tell me!

Another time perhaps.

OK, as you like.

Initiate: elicitation

Follow-up 2: turn passing

Respond: positive, preferred + Initiate: requestive

Respond: temporise, dispreferred

Initiate: informative

Follow-up 1: concession (negative outcome)