If they're on the phone and the male is calling the female and she doesn't know who he is, she will probably say, -¿Quién habla? which means Who speaks?, or Who's speaking? You don't generally ask Who's this? when you're "face to face" on the phone. In Spanish, it's a social slur to call someone éste or ésta to their face, or if they're within earshot. She might, however, say Who's this? when they're speaking about a third party; someone in a photograph, for example. In which case, she would ask him, -¿Quién es éste? referring to a male, or -¿Quién es ésta? referring to a female. Gender of the two speakers generally would not affect the conversation, whereas their level of familiarity would.
buscando
In spanish how you say good looking it is bonita for a girl or bonito for boy
Estoy buscando
You could say "Se parece bien."
Busco una chica.
en fronte de if your looking for the spanish translation
I think it's, "Te ves bien," or "Usted se ve bien," in the formal.
you would say "eres guapo" which means "you are good looking"
Mirando hacia adelante a verle!
Busco mi tía Denise.
Muy guapo.Very good-looking.