I know how the Prophet (ﷺ) used to say (Talbiya) and it was: 'Labbaika Allahumma Labbaik, Labbaika la sharika Laka labbaik, Inna-l-hamda wan-ni'mata Laka walmu Lk, La sharika Laka'.
Sahih al-Bukhari Book 25, Hadith 36