Dear Takahashi-san,
Just to reconfirm the payment method ka.
I discussed with Accounting here, and they suggested DIK paid first, and Takahashi-san pay back to DIK through me or directly to Yu-chan is ok ka.
The ticket is already booked, and shall sent to you the confirmation letter the soonest. Just another question, any chance you think the flight details might change? Price shall be different in case you need a flexible one.
Best Regards,
JA