From CNN: 

The Klobuchar campaign confirmed that the senator is flying to Dallas to join the former vice president at his rally, where she will suspend her campaign and give her endorsement on the eve of Super Tuesday. Former South Bend, Indiana, Mayor Pete Buttigieg also will endorse Biden at the rally, a source familiar told CNN.

https://www.cnn.com/2020/03/02/politics/amy-klobuchar-ends-2020-campaign/index.html