Task: Nathan: Your n8n Personal Assistant

n8n workflow:
{"nodes":[{"name":"Read Harvey's Email","type":"n8n-nodes-base.emailReadImap","position":[270,390],"parameters":{"options":{}},"credentials":{"imap":"Read Harvey's Mail"},"typeVersion":1},{"name":"Who Is The Email From?","type":"n8n-nodes-base.switch","position":[460,390],"parameters":{"rules":{"rules":[{"value2":"Louis Litt <louis_litt_1970@yahoo.com>"}]},"value1":"={{$node[\"Read Harvey's Email\"].json[\"from\"]}}","dataType":"string","fallbackOutput":3},"typeVersion":1,"alwaysOutputData":false},{"name":"Read Excuses File","type":"n8n-nodes-base.readBinaryFile","position":[670,230],"parameters":{"filePath":"/home/n8n/Excuse_Generator.xlsx"},"typeVersion":1},{"name":"Retrieve Excuses Spreadsheet Data","type":"n8n-nodes-base.spreadsheetFile","position":[860,230],"parameters":{"options":{}},"typeVersion":1},{"name":"Generate Excuse","type":"n8n-nodes-base.function","position":[1040,230],"parameters":{"functionCode":"var leadinmax = 24;\nvar perpmax = 25;\nvar delaymax = 23;\nvar leadin = Math.floor((Math.random() * leadinmax ) + 1);\nvar perp = Math.floor((Math.random() * perpmax ) + 1);\nvar delay = Math.floor((Math.random() * delaymax) + 1);\n\nvar excuse = items[leadin].json.Leadin + \" \" + items[perp].json.Perpetrator + \" \" + items[delay].json.Delay;\n\nitems = [{json:{}}];\n\nitems[0].json.excuse = excuse;\nreturn items;\n"},"typeVersion":1},{"name":"Merge Excuse and Mail Data","type":"n8n-nodes-base.merge","position":[1230,330],"parameters":{"mode":"mergeByIndex"},"typeVersion":1},{"name":"Send Email","type":"n8n-nodes-base.emailSend","position":[1460,250],"parameters":{"text":"= {{$node[\"Merge Excuse and Mail Data\"].json[\"excuse\"]}}\n\nMaybe next time.\n\nHarvey","options":{},"subject":"=RE: {{$node[\"Merge Excuse and Mail Data\"].json[\"subject\"]}}","toEmail":"={{$node[\"Merge Excuse and Mail Data\"].json[\"from\"]}}","fromEmail":"={{$node[\"Merge Excuse and Mail Data\"].json[\"to\"]}}"},"credentials":{"smtp":"Send Harvey's Mail"},"typeVersion":1},{"name":"Slack (Louis)","type":"n8n-nodes-base.slack","position":[1470,410],"parameters":{"text":"=Here is what Louis emailed you:\n```\n{{$node[\"Merge Excuse and Mail Data\"].json[\"textPlain\"]}}\n```\n\nHere is how \"you\" responded:\n> {{$node[\"Merge Excuse and Mail Data\"].json[\"excuse\"]}}\n\n:+1: *You're Welcome!* :smirk:","channel":"private","attachments":[],"otherOptions":{"mrkdwn":true}},"credentials":{"slackApi":"Nathan's Slack API Token"},"typeVersion":1},{"name":"Slack (General)","type":"n8n-nodes-base.slack","position":[890,470],"parameters":{"text":"You've just received an email. You may wish to check it out.","channel":"private","attachments":[],"otherOptions":{"mrkdwn":true}},"credentials":{"slackApi":"Nathan's Slack API Token"},"typeVersion":1}],"connections":{"Generate Excuse":{"main":[[{"node":"Merge Excuse and Mail Data","type":"main","index":0}]]},"Read Excuses File":{"main":[[{"node":"Retrieve Excuses Spreadsheet Data","type":"main","index":0}]]},"Read Harvey's Email":{"main":[[{"node":"Who Is The Email From?","type":"main","index":0}]]},"Who Is The Email From?":{"main":[[{"node":"Read Excuses File","type":"main","index":0},{"node":"Merge Excuse and Mail Data","type":"main","index":1}],[{"node":"Slack (General)","type":"main","index":0}]]},"Merge Excuse and Mail Data":{"main":[[{"node":"Send Email","type":"main","index":0},{"node":"Slack (Louis)","type":"main","index":0}]]},"Retrieve Excuses Spreadsheet Data":{"main":[[{"node":"Generate Excuse","type":"main","index":0}]]}}}