sentence: I mean , after reading the terms and deposit policy , I understand I must pay for the first night at the time of booking and the rest of the stay should be paid upon arrival at the front desk .
modified: I mean , after reading the terms and deposit policy , I understand I must pay the first night at the booking time and the rest of the stay it would be paid upon arrival to the front desk .
transformation: PREP, OTHER, PRON, VERB:TENSE, PREP