Synonyms for 'sure' [certainly; without doubt; yes?]

Hi teachers,
Would ‘certainly; without doubt; yes’ be synonyms for ‘sure’ in the context? All of them?
A. Would you like to meet my sister?
B: Sure!

Thanks in advance.

They all make sense, but “without doubt” is not very likely in ordinary conversation.

Hi Dozy,
Thanks for your help.