Hi @Craig2
Being a good host is = accommodating your guests requests...
You are just starting and could use some great reviews (which you already have 4)
I wouldn't mind complying with your guest request... I'm pretty relaxed about my rules and my rentals... Airbnb is here 365 days a year...
I just lost 7 days next week because a guest had a problem and needed to cancel.... I asked her to chose any other available date and I would move her reservation...
Most likely I will not be able to fill the 7 days she changed... But she is happy and most likely she will leave a nice review when she comes...
Ultimately the final decision is yours...
Luis