Change the narration of the dialogues to indirect speech:
Suman: When will you be eighteen?
Geeta: I don't know
Suman: Don't you celebrate your birthday?
Geeta: I can't remember.

Dear Student,

Suman asked Geeta when she would turn eighteen to which Geeta replied that she didn't know. Suman again asked her if she celebrates her birthday but Geeta replied that she couldn't rememner.

Regards