"Confirmation of your appointment will be subject to satisfactory completion of a period of probationary service of three months. During this time your performance and conduct will be carefully monitored and reviewed. The company reserves the right to extend the probationary period. During the first three months of the probationary period, your employment may be terminated by one week's notice on either side. From the fourth month to the end of the probationary period the contract may be terminated by four weeks' notice on either side. There will be no paid holidays in the probationary period."