This paper treats requests for ambulance from a corpus of emergency calls (119 calls), which were audio-recorded at a 119 dispatch center during the summer of 1994. In these calls, it is observable that when callers identify themselves, almost all of them use relational terms along with their names, e. g., “ (My name is) Yamada Hanako. wife. ” The question is not why they use such relational terms, but what they do as they use such terms. In order to treat this question, a device-what Harvey Sacks named Membership Catergorization Device-and its use will be considered.