End of expression needed for value in Assign Activity

Hi Team,
I am trying for the output as below,

Name: K.BOOKER, Time: 9:38am, Date : 2/04/2020

While am assigning to a variable in assign activity am getting as error below:

Can you please let me know how to solve that error.


“Name :” +Signed_By+“Time:” +DeliveryTime+ “, Date :” +DeliveryDate+