Hi , Mark ! Long time no see !   Hi , Alex !   Where have you been ?   I just got back from London .   How was your flight ?   It was OK . There was a lot of turbulence , though .   That ’ s too bad . how long was the flight ?   It was 10 hours .   Did you have a layover ?   Yes , in paris , France .   Did you buy anything in the duty-free stores ?   Yes . I bought two boxed of chocolate ? one for me and one for you !   Oh , you didn ’ t have to ...   It was nothing . 