Dilli if you provide a wheel chair she will be fine . I have a friend whose mother went back to Nepal in a same situation last year. After she went back she told my friend that they put her in the first class and really gave her a good service. She said she dont have to speak a word and everything was perfect. She was so scared before but now she said she can come back here by herself. One thing it was not Qater airways it was cathypacific but still i think she would be fine. But make sure you put her in wheel chair.