Pre-Thanks
When someone thanks you for a job, action, help that has not even been started. Now you are obliged to carry out the action for them.
The teacher pre-thanks the technician during their text conversation:
Teacher: My Computer is going crazy. It is shutting down and flickering sporadically.
Technician: OK, I will be there later today to take a look.
Teacher: Oh, Thank you so much!
Teacher: My Computer is going crazy. It is shutting down and flickering sporadically.
Technician: OK, I will be there later today to take a look.
Teacher: Oh, Thank you so much!