Plotting Bode Diagrams of exponential functions in MatLab(with unknows and a complex) (I'm a 23-year-old Electrical Engineering undergratuating student)

Hi there, I'm having a hard time trying to plot a Bode Diagram here in MatLab.

The transfer function not only has an exponential function in it, but also has 3 unknowns to which I am not supposed to assign value, and on top of that it is a complex number.

Let me write it down to you:

H(s) = A * exp(-s*B + j*C)

A and B are just two "unimportant" unknowns, but "C" is the function's Phase.

I don't know if it is possible to plot the diagrams without assigning values to A, B and C, but I'm asking you guys here anyway.

Thank you very much.

Regards, Ramon.