['My friend who never say no to me. Such a great companion she is! She asked me for a help. At the time I was out of town, so I was unable to do a favor', 'She probably understood.', 'I hope she did.']
If she is a really good friend then she did. Dont worry about it.
I was unable to help my friend who's in need. But I tried my level best to help her to solve the issue. She understand and get the issue solved through our another colleague.