examples of dialog using expression of suggestion

A : We have been waiting nearly three quarters of an hour.B : Yes, I think the bus will never come.A : Would it be an idea to walk?B : Yes, It's a good idea.A : Has the new restaurant opened today?B : It has opened yesterday already. My friend told me it has a new and delicious menu.A : Why don't we eat there?B : It is a wonderful idea.