[Gildor]

Here are some examples of possible contact responses:

1. ATTACK AT ONCE X

2. EXCELLENT UPDATE X DETECTED TASK FORCE PREVIOUSLY UNKNOWN X INTERCEPT AND ATTACK X

3. ULTRA X ENEMY TASK FORCE CRITICAL TO JAPANESE PLANS IN THE AREA X ATTACK AT ALL COSTS X

4. GOOD INTERCEPT X ENGAGE ENEMY TASK FORCE X

5. ENGAGE ENEMY TASK FORCE X PRIORITY TANKERS X

6. ULTRA X ENEMY TRANSPORT IN YOUR AO CARRIES REPLACEMENTS FOR NEARBY GARRISON X HIGH PRIORITY TARGET X ENGAGE AT ONCE

These are just some examples. Each is a result of certain probabilities and criteria.
It could be only if you do a contact report after a certain date, with certain types of ships, etc.