Dear Amy: On a short airplane flight, I was seated next to a woman who chatted to me nonstop about this and that, while I listened and smiled politely. When she started to voice opinions that I didn’t share and didn’t want to discuss, I tried to wrap up the conversation and turned to my phone. I texted my daughter an unkind remark about the woman, which the woman saw; she would have had to make an effort to see what I was writing. The woman became upset, and I felt terrible. I apologized profusely.