Taking an Empty Queue

In clinics and other places, queues are formed by electronic numbers. It often happens that a number is called, and the owner of the number is not present. Is it permissible for a person with a later number to take the number whose owner is absent, as ownerless property, or is this number canceled, and the right automatically passes to the next in line?

Hello and Happy Hanukkah

A queue is binding according to Halacha, and therefore when the owner of the queue is not present, the queue passes to the next in line, and it cannot be skipped. 

According to the opinion of our teacher, the Gaon, Rabbi Ovadia Fried, shlita

See Gemara Shevuot 30 and Sanhedrin 32 

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