Im trying to use a date time attribute coming from a context attribute which then I need to format and put it inside an email

This is the script that Im testing

Your appointment time: {%= formatDate(context.journey.events.1697323153.timestamp,"dd/MM/yyyy HH:mm") %} 

But Im getting this error: Invalid syntax Invalid syntax Error in parsing PQL expression "formatDate(context.journey.events.1697323153.timestamp,"dd/MM/yyyy HH:mm:ss")": line 1:10 mismatched input '(' expecting <EOF>. Error beginning at position: Line 1, Character 24

Can someone help!