Off topic, but nobody else could give me an answer.?

[girl who loves sports]

So, this guy i met on facebook (i don't meet complete strangers, he knows some of my mutual friends & i've seen him around, i just never talked to him.) Asked me to call him & i dunno what to say, really! Plus i'm self concious about my voice because ppl say i sound like a cartoon & im 19!

help. what should i say?? as in conversation wise.
thank you!! good answers