Do you have hopes/plans for the future?
Is the assistant position really a dead end job in which you can never advance?
What was your reason for taking Travel & Tourism? Are they be preparing you for a bright future? How are you doing in learning this business? Will you be abandoning this direction/goal?
If you have to leave a position as a support assistant will this be an easy position to get hired back into elsewhere? Maybe, in it's entirety, this is not such a hot prospect after all.
If you loose a position in a Travel & Tourism office how easy would it be to become reemployed at another office? There are certainly a great many Travel & Tourism businesses about with many more opportunities for employment.