['I already booked my flight for vacation before requesting a leave from work!', "Oh no! That's exciting and terrifying. Do you think it will work out?", 'I sure hope so! I am quite hopeful that I will get my holiday approved since I have worked overtime for 3 months!']
In that case I'd say you very well deserve it! I hope you get it.
I already booked my flight before requesting a holiday.