PUSH Notifications in HANA

Hi All,

I have created an UI5 application with HANA backend using Odata service for flight details.

Now we are looking for a scenario where only one ticket is available for booking and two users are trying to book the same ticket at same time.

Here, I need to allow one user to book the ticket and restrict the other.

Is it possible in HANA? If so how can we achieve this?

Thanks in Advance

Arun.