How do I check my United Airlines flight booking status?

https://www.flyertalk.com/forum/delta-air-lines-skymiles/2186416-how-do-i-request-flight-change-medical-reasons-delta-airlines.html#post36891981
https://www.gc-forever.com/forums/viewtopic.php?t=6463
https://www.gc-forever.com/forums/viewtopic.php?t=6464
https://www.gc-forever.com/forums/viewtopic.php?t=6466
https://www.gc-forever.com/forums/viewtopic.php?t=6467
https://www.flyertalk.com/forum/delta-air-lines-skymiles/2186416-how-do-i-request-flight-change-medical-reasons-delta-airlines.html#post36891981
https://www.flyertalk.com/forum/delta-air-lines-skymiles/2186417-1-833-246-4287-ota-how-do-i-cancel-delta-airlines-flight-24-7-live.html#post36891985
https://www.flyertalk.com/forum/delta-air-lines-skymiles/2186418-instant-response-can-i-cancel-my-delta-airlines-ticket-get-refund.html#post36891990
https://www.gc-forever.com/forums/viewtopic.php?t=6468

https://www.flyertalk.com/forum/delta-air-lines-skymiles/2186419-1-833-246-4287-ota-can-i-transfer-my-delta-airlines-ticket-another-person.html#post36891996