1. Give her a big hand.
2. Let's clap for her.
3. Put your hands together for her.
(Are they all the same? Do you have some more similar expressions?)
4. Have a conversation with him.
5. Talk with him.
6. Speak with him.
7. Communicate with him.
(Can we use all the sentences? Do you have some more expressions?)
1-3 are fine. You can also say, "Let's have lots of applause for her."
4-7 are fine, too.
5 and 6 can also be varied by substituting "to" for "with."