Frequent timeout issue

Hi,

I've a flow triggered via a chat bot.

Once somene type a message in the chat, the flow starts in order to read a very short excel (less then 90 rows) and prepare an output message depending by the excel contents.

Although it has to read few records, it is very slow (!?!?!!) and often it spends more than the current application timeout so, instead to received the prepared message, I get the following message when executing the last step of the flow:

The execution of template action 'Return_value(s)_to_Power_Virtual_Agents' is failed: the client application timed out waiting for a response from service. This means that workflow took longer to respond than the alloted timeout value. The connection maintained between the client application and service will be closed and client application will get an HTTP status code 504 Gateway Timeout.

I have tried to look for the possibility to increase the timeout of the last step but I dind't find anything under its settings section.

Where the application timeout setting is?

Thanks

Regards,

Antonio