How to match response and request in SS7 camel packet

Hi all, I'm trying to read values inside CAMEL packet going through Intelligent Network via SS7. I use wireshark to capture data. There is something I'm not clear to understand. Here is my concern:
- MSC and gsmSCF exchange a lot of messages in order to set up a call (initialDP), Apply Charging, release call, ... But at one moment, there is a hundred of calls at the same time so that MSC send a hundred initialDP information to gsmSCF . Also, gsmSCF send back a hundred response to gsmSCF (continue or Apply Charging ...). So, from gsmSCF side,how it match these feedback from MSC to the corresponding initialDP information. For example, I make a call with my phone number 0985896907, and then use wireshark to capture all packets. With wireshark, I'm able to see my phone number in InitialDP but I cannot know which are the response message for my call among a thousand of release call messages. Is there any sign in the packet exchange in order to match the answer and the request. Some one told me it is in TCAP but I don't know which parameter carrying the sign. So, experts, please help me if you have any idea about it. Thanks a lot.