My Technician Do not allow change staff after booking

Nga Do (ND)
Hang Ho (HH)
Hanh Do (HD)
Hong Nguyen (HN)
Lan Do (LD)
Thuy Ho (TH)
Trang Vo (TV)
Lan Nguyen (LN)
Anh Tran (AT)
Anh Le (AL)
Diem Nguyen (DN)
Philip Vo (PV)
Loan Nguyen (LN)
Morgan Rohling (MR)
Hanna Tran (HT)
Phat Duong(Johnny)
Khanh Pham