But the purpose should be positive and there shouldn't be any sin involved. A girl before leaving her house should inform her parents and so on. So, any reliable Hadith something like this islam.stackexchange.com/questions/391/…

If by dating you mean old style courting, where the male and female speak politely with a chaperone, this would be allowed by many opinions (but not all!

I recall reading in The Reliance of the Traveller that a woman is not to talk to a non-mahram, even to reply to his salaams).

In most cases, the family will come along and supervise the date.

Families have a great deal of involvement in dating and marriage.

It is very important for the family to like the person who is going to marry their children.

Because of that, they spend a great deal of time with the person while on dates. Some might say it is hard to get to know someone when under constant supervision.

But to keep in mind, they should stay in the limits!

They should just know each other such as their nature, their likes dislikes!

Like they are engaged or are to be engaged to each other and want to know more about each other.

Then it is allowed for them to talk and know each other.

Muslim singles cannot meet someone of the opposite sex alone.