Following is a picture showing the SMS call flow in GSM, from the origination of SMS at the Mobile Station of the subscriber attempting to send an SMS, to the Mobile Station of the recipient subscriber.

There are a multiple GSM MAP messages, i.e. MO-forwardSM, SRI-SM, MT-forwardSM, which are sequentially exchanged to perform an SMS operation/transaction (i.e. the complete call flow of sending and receiving of an SMS, according to the following diagram). My question is that if one has a dump of SS7 packets, how can I identify which MO-forwardSM, SRISM and MT-forwardSM packets belong to the same operation/transaction?