Asked a girl for a coffee today and looks like she isnt interested about it. What do you think?

So i am currently interning in this EdTech startup where everyone is young in their 20s. I am 24 and have been talking to several girls who are also new interns like me in the office. After talking to some of these girls, i thought of asking this girl(lets call her K) who is 21-22 and an intern like me too to grab some coffee with me. We had been talking for a while and she seemed comfortable with me.

But after asking her whether she would like to grab a coffee with me, she answered "I will think and let you know" rather than a full yes or no. And i asked her for a 1 on 1 hang out tho as I dont really have a friends circle here and most of the approaches i made towards the girls have been me alone approaching them. Looks like she isnt really that interested in me tho given her reply.