I agree—at least, I suppose I do

I agree that something ought to be done

I always welcome criticism so long as it is sincere

I am absolutely bewildered

I am afraid I am not familiar enough with the subject

I am afraid I cannot suggest an alternative

I am afraid I've allowed you to tire yourself

I am afraid I must confess my ignorance

I am afraid you will call me a sentimentalist

I am always glad to do anything to please you