The response delay of the user within a conversation (in seconds)

The following sequence of messages defines conversations (I for an incoming text, O for an outgoing text, - for a one minute delay):

I-O--I----O, we have a 60 seconds response delay and a 240 seconds response delay
O--O---I--O, we have a 1200 seconds response delay
I--II---I-I, we don't have a response delay. The user hasn't answered

For this user, the distribution of response delays will be [60, 240, 60]


See Using bandicoot for a definition of conversations. Conversation are defined to be a series of text messages each sent no more than an hour after the previous. The response delay can thus not be greater than one hour.