options: f : i have called david for an hour just to see if he is busy . f : i 've been calling david for two hours . i 'm just trying to cancel my appointment . f : i 'll try again . i 'm calling to invite him to watch the film . f : although i 've been calling david for an hour , i 'd like to try again , because i 'm calling him to invite him to watch the film .
article: f : i 've been calling david for the past half an hour , but i keep getting a busy signal . m : well , if you do n't get him soon , we 'll just have to go to the movies without him .