I wish my friend didn't cancel on me last minute, I was really hoping she could go with me to that special concert.
That's a shame. Is there someone else who can go with you? I'm available. LOL
Thanks for the offer! Yeah, she just unexpectedly told me that she had a work obligation to attend instead.
I'm sure she really wanted to go. Sometimes we have to make choices we don't like. My offer still stands. 
That's true. Thanks for reminding me about that.