SQL code for time between answers

[hellproducts]

Hey there. My apologies if this isn't the right place for my question.
The company I work for uses a third party report generator and one of the reports must have - amongst other things - a detailed view on a ticket. To be more exact, the report should contain the time between replies (the elapsed time from when a customer reply comes in to when the agent sends him an answer). Could someone point in the right direction for creating this SQL query? Thank you in advance.
PS: the database we're using is MySQL.

[MichaelR]

take each article from a supplied ticket, take the create times for each article and use them!

[hellproducts]

Thanks, MichaelR.
I've managed to get my data using a stored procedure .

[kiafi9]

Hello,
Please, could you tell me how you do exactly that with details?


Thanks in advance