Hello Forum, There is a requirement where we need to interface with chat an

As mentioned in above comments, Appian does not have video conferencing/chat features. So, your option is to integrate with other third party platforms which provide chat/video conferencing using their API.
One approach that I think is feasible is: Create an external web application (HTML/JS as front-end, Some Server Side technology like Spring Java framework at backend..). Then use the API provided by the third party platform to get chat/video conferencing features.

You can then use Embedded SAIL or Web API to integrate your external web application with Appian.
Some third party platforms which provide chat/video conferencing via programmable APIs are: https://tokbox.com/ (this is free)
https://developers.oovoo.com/
https://www.applozic.com/
www.sinch.com/.../

Note that integrating with these third party platforms will need skills in Java and JavaScript.

As mentioned in above comments, Appian does not have video conferencing/chat features. So, your option is to integrate with other third party platforms which provide chat/video conferencing using their API.
One approach that I think is feasible is: Create an external web application (HTML/JS as front-end, Some Server Side technology like Spring Java framework at backend..). Then use the API provided by the third party platform to get chat/video conferencing features.

You can then use Embedded SAIL or Web API to integrate your external web application with Appian.
Some third party platforms which provide chat/video conferencing via programmable APIs are: https://tokbox.com/ (this is free)
https://developers.oovoo.com/
https://www.applozic.com/
www.sinch.com/.../

Note that integrating with these third party platforms will need skills in Java and JavaScript.