Create the next button or icon for Airlineplus

Airlineplus

We are launching a new service towards the traveler. This service will be available during the booking process of a couple of airlines.
Thanks to this service a passenger , once he/she shall choose a flight and the corresponding fare, will have the opportunity to put this fare “on hold” for about 48 H. Then, once the passenger has made his/her mind up, he’ll be able to buy the ticket, for the total price, if the decision is done within the 48 H.
This means that the passenger will have the “time to think” if he or she is going to travel to this place.
This service could be named “Let me think”, or “Block my fare”; “hold my fare”, or “hold this price for me, please”.

The values we wish to display in this icon, are that, thanks to this option, the passenger has the time to make his mind, thanks to this practical service.
We want to transmit the values of : affordability, to a convenient and practical service, responsive, reliable.
For this icon, we are looking for a Web 2.0 style, modern, very sleek, with an institutional look. It needs to transmit a feeling of elegance, quality of service, security and convenience. All these under an affordable price.
The icon will be displayed in a “frame” like text box, to highlight the area where the passenger will be able to “clock “ on the radio button offering the service.
Letter based icon are welcome.
The icon will need to be suitable for web and print.
There are no pre-existing ideas for the icon as this is a new service, so open to all ideas!
Please feel free to experiment with colors!
Please do not use any stock images or clip art in the icon
The files we will require are:
Print file format - .ai (CMYK)
Web file format - .jpg and layered .psd (RGB)