Looking for suitable calendar for project

[sambkk]

Hi All
I am hoping one of you guys can help me out.
I am developping a travel booking system.

(php & Mysql)

Admin users only.
its not very complex. Customers book travel packages for certain dates. (1 per day, no multiple days)

The main admin view should be a calendar. So users can have a direct calendar view of all the bookings.

Can anyone recommend a calendar, available on the net that could be somewhat painlessly integrated to my project.
Perhaps someone has done something similar.

I would really appreciate tips on where I could find a suitable calendar.

Thanks

Sami