You might want to give a shot to Stippl! It aims to simplify your travel (planning), and also has document forwarding. Doesn't yet do email parsing though.
Looks good! I will try when you add email parsing feature :) It is a pain to input details manually but I like having all my information in once place when I travel: confirmation numbers, hotel addresses, phone numbers, etc.
On plus side, as someone suggested LLMs like ChatGPT should be a very good fit for email parsing and easy to integrate (e.g. ChatGPT API asking to output JSON).