https://www.youtube.com/watch?v=EfzQRRefo1E

Sheremetyevo Airport offers passengers with reduced mobility individual help in terminals, including during boarding and disembarking from aircraft. At Sheremetyevo Airport, any passenger can get the information he/she needs by contacting the information desk or check-in counter, using the communication channel of an interactive touch—screen counter (installed in terminals) or by notifying the airport of an upcoming trip via feedback channels.