Generate two calls from Asterisk and bridge them

i can generate 2 outbound call by using following command

originate local/01753859595@from-internal extension 01841787822@from-internal

let
call-1=01753859595
call-2=01841787822

after receiving call-1 next call generate to call-2.

but not able to talk to each other.

please help me how to birdge each other.