Dear sir/Madam,
Thanks for your visit today.
I am sorry that I have to handle a sudden affair when you arrived,i wish we can make an appointment again when you are convenient.
sorry for inconvenience and hope for a perfect meeting next time.
best regards
your sincerely'
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i am sorry that i could not give you a good serveice when you called on me ,but i had an important meeting and i must join,so please forgive me.
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