I don't know, I never had to lie to a doctor before, also maybe they could ask me to go see a psychiatrist to ensure them I have anxiety ? I saw Oxazepam looks appropriate for a one-time use, it could be the good one to ask.
I doubt it about the anxiety part, it's quite common for people to be scared of flying and be prescribed something to chill em out, I knew someone that did this, but I think to abuse them, cause I don't remember them going on holiday. So the flight excuse is a good one, don't veer off it.
Dentist excuse I reckon would be less effective as I've never heard of it before, why was it not offered or suggested over my fear of dentistry? And it wouldn't work anyways, I had to choose between saving teeth awake, meaning lots of mouth intrusive appointments and pain (numbing doesnt work nor can i remain calm when it does work due to the pressure and sounds and thoughts and images at what they're doing)... Or be put to sleep and have them all pulled...
Sedation was a no go as well.
I now have 6 lower front teeth to hold an ill fitting denture and the top denture is useless. I have no optimism about ever having a working bite so i can chew and eat wider range of foods with NHS poor treatment. I now slurp pot noodles every few hours every day.
I just want to eat peanuts again tbf, I used to enjoy em before teeth went bad. Easy filling snack when I don't feel upto eating meals.
Anyways, apologies for the tangent.
Flight excuse for sure.