"Yes, good morning."
Translation:Ano, dobrý den.
Translating Dobrý den to good morning is very very misleading and incorrect! Good day is more acceptable although it is rarely used in English, but "den" does NOT mean morning! It's annoying!
Dobrý ráno is Common Czech, an interdialect which is the actual mother language of most Czechs and which is used for colloquial communication. Standard Czech is "Dobré ráno", as ráno is neuter.