Hello , Jack here .   Hello , Jack . It's Mary . What are you doing in your office ?   I am working . I often work late on Thursdays . I am busy this week .   Would you like to come and have dinner with us on Friday ?   Tomorrow ? No , I'm afraid I wouldn't be able to . I'm going out of the town on business .   What about Saturday ?   Sorry , I never go out on Saturday evening . I always watch football on Saturday evening .   Will you come round next Tuesday ?   Next Tuesday ? Just a moment ! It will be the 21st of May . Oh , dear . Arm ... I promised my aunt I would be at her birthday party .   What do you say to next Wednesday then ? 