what's the title of the party?

[flytothesky]

Hello~
could you help me what will be the most natural way to say in this conversations?

A: We have a party tonight, would you come?

B: What's the title of the party? (or what's the topic of the party?)

A: Title of fairwell for John, he will leave our company.

Many thanks~

[Clark]

Hello~
could you help me what will be the most natural way to say in this conversations?

A: We have a party tonight, would you come?

B: What's the time of the party? (or what's the topic of the party?)

A: Title of fairwell for John, he will leave our company.

Many thanks~

- We are having a party tonight. Would you come?
- What are you celebrating?
- It's a farewell party for John. He's leaving the company.