My friend and were talking about old cartoons and she mentioned one that we both barley remember any details of besides one side character a telephone operator. This is all we remember about her and the show.
1. she was in many or all the episodes 2. her face was barley or never shown 3. she was possibly blonde 4. the animation was very simple 5. she'd say a line similar to "okay i'll patch you through" 6. It wasn't rosmary from hong kong phooy
To update, after contacting her about it once again and showing her the mentioned characters/shows she's denied it's Hana's helpline or Ms. Sara Bellum.
As for the other comment we both think she was most likely either a switchboard operator or receptionist.