```mermaid sequenceDiagram autonumber participant A as Alice participant P as PFI A->>P: RFQ P->>A: ACK P->>A: Quote ``` 1. Alice sends PFI an RFQ containing the VCs requested by the PFI 2. PFI responds with a receipt that indicates the RFQ has been received and that they are processing it 3. PFI sends Alice a Quote