I would say "Assalaam Aleykum wa Rahmatullahi wa Barakatuhu," which is a common Islamic greeting meaning, "Peace, mercy, and blessings of Allah be upon you." This greeting honors the recipient by invoking peace upon them and invoking Allah's mercy and blessings. By using this greeting, I am introducing myself as someone who follows Islamic customs and practices and expresses respect for the person I am meeting for the first time.