Find and communicate with contacts from where you left off.
To search for a conversation in chat, type your contact’s phone number, name, or message in the search field.

As you’ll do that, it will bring the conversation to match the search query. You can also look for a particular message by switching to the Messages tab.

Furthermore, you can also sort conversations in the Latest or Oldest order.

Simply click the

Sorting button and then select either: Latest First or Oldest First.
Chat Search Filters
If you want to narrow down the search, you can use the filter options. Simply click the

filter button to access filter options.

Then apply filter rules, and once done, click Apply.