Suits me fine. If you study the task-sheets closely, you will find that the information that A and B have is slightly different in terms of functions. Well, I don t know. That s a good idea. Yes, I d be delighted.
Suggestions are milder than commands, and they have a way of influencing people.
Sometimes, the decision about what to do lies with the hearer. The response, That s a good idea, shows acceptance of A s suggestion made in No. 3. This is similar to No. 3 in function but is expressed by a different structure. B s answer, Yes, I d be delighted has the same intonation pattern as That s a good idea in No. 4. Here again, it leaves the decision about what to do to the hearer.