to call you
Ippolit, desculpe te chamar assim, não sei seu sobrenome!
Ippolit, sorry to call you that, I don't know your last name!
— Ирония судьбы, или С легким паром! (1976)
I don't know what to call you.
Fugiu da minha mente te chamar.
It escaped my mind to call you.
What should I call you?