Touch screen to make phone calls with Webflow

Hi, I have a webflow site for a co working space that shows all the tenants at the space. You can see it here: https://tims-supercool-project-ce93fb.webflow.io/

The client wants the ability when you click on message now - to make a phone call to that business so they can chat.

I am thinking using slack, or twilio or something else to get it to work.

What do you guys suggest?

Connecting the CMS field ‘phone’ to it doesn’t meet your needs?

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Yeah that works if they are on a phone, but this is setup on a touchscreen that has a microphone on it.