How to update the message for fallback?

[Lisa71]

Currently, when no relevant info is found, it will give the fallback message "Unfortunately, there is not enough information available to address this query completely. Assistance can be provided on other topics if needed.“ How shall I update this message? 

[Tanushree Maiti]

Please refer this links, see if it helps you:

Modify options in VA when no results found - ServiceNow Community

[Lisa71 · Accepted solution]

This doesn't work for me, however I got this place sys_cs_context_profile_message  which can help update the message. Problem resolved now. Thanks.