What if I am silly on the phone at work?

Let’s say I am answering my phone at work and someone else who works in a different department wanted something done and it was an important phone call and I was being silly and made a joke with farting sounds and act like a kid with saying: “HAHAA I WANT MY MOM TO HELP ME WITH THIS JOB BECAUSE I LOVE PLAYING!” or if I asked: “Are you a head?” lol What will happen then?