While i am calling
curl --location --globoff 'https://graph.facebook.com/v18.0/t_1499689317517496?fields=messages%7Bid%2Cmessage%7D&access_token=<access_token>' --header 'Cookie: fr=0Q7HE8QEHfxs7QGke..BlXIQQ._o.AAA.0.0.BlXJwZ.AWWjigSjQDs; sb=EIRcZUJfyziB2q-6hxBEcdJK'
this api then getting conversation messages. But for appointment data getting an empty string as show in the figure.
api calling image Conversation image
I have tried to called above mention api but did not get result as expected.