I am contacting you regarding my travel booked through Expedia on American Airlines flight on July 26, 2021 from St. Louis, MO to Portland, OR with a connection in Dallas, TX. On my flight from St. Louis flight #2901, I had a window seat and a Very large man was seated in the middle seat of my row with another man on the aisle seat. This very large man took over half of my seat and the seat of the man on the aisle seat. The seat belt was not large enough for him to use. This caused me to be VERY uncomfortable with leg cramps from being squeezed by this man taking up over half of my seat. I would like to be fully refunded for the cost of my ticket as that man should have been advised to purchase two seats. I paid for a full seat not 1/4 of a seat. Expedia Itinerary #[protected] ticket #[protected]. You may reach me at [protected] and at asia.[protected]@gmail.com. Thank you.