First App:

A Page with List of request with details like

1. Issue raised by person A
2. Address of location
3. Date. In the list details page - Person A should be able to talk to Person B

Second App: The issue raised by person A should reach out to person B and Same list should be shown to him as well.

Messaging between Person A and Person B. In the list details page - Person A should be able to talk to Person B In the list details page - Person B should be able to talk to Person A