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here, where it appears that ticket may be issued under DL's 006 (given the circumstances i.e. the current turmoil within AZ, this could indeed be a wise move). That said, I flew AZ to SCL (Warsaw via Rome) with work on a number of occasions during the past 6 months (just before our corporate travel agent blocked all 055 issued bookings) and was quite impressed by the product: decent food, comfy seat on a refurbished 777 and the new[ish] lounge in Rome being the added value (if one doesn't mind the rather nonchalant attitude performed by the cabin crew, but that's nothing new I'm afraid).
G