Need help in creating dependency fields using behaviour

[kedar]

Hi All

I have two fields one is Country field and other is City field.

In country field values are (India,USA,Saudi arabia)

In City field values are (Delhi, Newyork,Jeddah)

When I select the name in the country field  the name of the city should get updated automatically .

I'm using Jira cloud can you help with it .

Thanks,

Kedar P