Automating Lead Response Tracking in HeyReach Webhook for Clay

Hi All, I need help with a HeyReach to Clay webhook. I want to pull through the response from the lead, however I can't know when in the sequence the response will be, the recent messages can be as many as 7+. This is because we send follow ups if they don't respond. So the lead might respond straight away (2 messages total) or after we send 5 messages (6 messages total)- I have a table where I extract the reply and run an enrichment to categorise it (interested, not interested etc). Is there a way I can add a column automatically based on 'is reply: true'?