Raibarelli

Guide to a worker: Where did my student X go?
Worker: Woh raibarelli gaye hai?
Guide:????? I just saw him a few minutes ago???
Worker: Han sir, woh abhi nikeli hai. Aadhe ghante mein wapis aajayengi bole the.

Guide: ???
Student Y notices the confusion and realises what is happening.
Student Y: On no sir, X has gone to the library and will be back in half an hour
Worker: Haan sir, raibarelli :)