Thanks for that info and choosing the Apple Support Communities. It sounds like you want to send a slide show to a contact via the Messages app on your iPhone. To do this, you can make a presentation in the Keynote app on your iPhone and then share via Message with these steps:
Open the presentation, then tap
.
Tap Share, then tap an option for sending:
AirDrop: Tap a recipient. The recipient must accept your presentation before it’s sent.
Mail, Messages, or another service: Tap More to add another service to the options. You set up other services in Settings, accessible from your device’s Home screen.
iCloud Drive or another file provider: Tap “Send to.” If the location you want is open, tap a folder, then tap “Export to this location.” To choose a different location, tap Locations, tap a service in the menu (you may need to turn the service on), then tap the “Move to” button to confirm. If you don’t see a service or provider in the menu, make sure it’s installed on your device.
Upload to a computer, server, or file provider: Tap iTunes, WebDAV, or More (to add a third-party service).
Provide the requested information (an email address if you’re sending an email, for example) then send or post the copy.
Send a copy of a presentation - Keynote Help for iPhone
Cheers!