good morning
From Longman Dictionary of Contemporary Englishgood morninggood ˈmorning ●●● S2 interjection formal HELLOused to say hello when you are greeting someone in the morning → good afternoon, good eveningRegisterIn informal everyday English, people often just say Morning. If you don't want to sound formal or informal, you can just say Hello: Morning, Joe.Examples from the Corpusgood morning• I smiled at her and wished her a good morning.• I smiled cheerfully, wished everyone a good morning and began to stuff the food into my mouth.