reservationssuch
Reservationssuch is a term that appears to be a misspelling or a portmanteau of "reservations" and "such." In the context of booking or holding something, "reservations" refers to arrangements made in advance for a hotel room, table at a restaurant, ticket for an event, or other services. "Such" is a word used to indicate a similar kind or type, or to refer back to something previously mentioned.
Therefore, "reservationssuch" likely implies a situation where multiple types of reservations are being made or considered.