Wa `alaykum As-Salamu waRahmatullahi wa Barakatuh.
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
Dear questioner, we would like to thank you for the great confidence you place in us, and we implore Allah Almighty to help us serve His cause and render our work for His Sake.
Answering your question, Sheikh Ahmad Kutty, a Senior Lecturer and an Islamic Scholar at the Islamic Institute of Toronto, Ontario, Canada, states:
It is also a good practice as long as one does so without excessive fanfare and pomp. As Imam Nawawi states in Kitab al-Adhkar welcoming the pilgrims with a prayer like “May Allah accept your hajj, forgive your sins, and replenish your provision” is fine. We read in a report that the Prophet (peace be upon him) prayed as follows: “O Allah! Forgive those who perform Hajj as well as those they pray for.”
Furthermore, wishing well and congratulating each other for blessings and favors is a good custom; it is bound to enhance and strengthen the bonds of Islamic brotherhood.
Allah Almighty knows best.