` bethanie 's ' heartfelt message to airline and pilots shared on twitter .
female writes how she wants to ` extend a compassionate hand '
thanks the pilots for allowing her to travel between spain and england .
says that they are ` the reason i can smile tonight '
letter shared on twitter by jai dillon , colleague of pilots who received the handwritten note .
emotional message comes a week after germanwings disaster that saw andreas lubitz deliberately crash plane killing 150 people .