United Airlines allows name changes to correct minor errors or for legal reasons, but generally prohibits transferring a ticket to another person. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) The exact process and any fees depend on the type of change and when you request it. 

Minor name corrections

For simple typos, misspellings, or adding a missing middle name, United may process the change at no charge. 

• Timeframe: You should request this correction as soon as you notice the error. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) Acting quickly may reduce the chance of incurring a fee.
• How to request: You can try to make the correction online through the "My Trips" or "Manage Reservations" section on the United website. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) If you're unable to do it yourself, you can call United's customer service or use their online chat feature.