My friend message me that “I will be visiting Hanoi on 17th April”
I want to ask if she will travel for leisure or for business. What tense should I use? I’m asking about the future too so should I use future tense?

Question

Answer

(a) Are you travelling for leisure or for business? 
(b) Will you be visiting for leisure or for business?

Option A is more succinct, thus that's my preference, but it uses the present continuous tense, which may be less intuitive for native speakers, since we're talking about the future. Option B is also fine, and uses the future continuous tense.

Answer

Natives typically ask: "Are you traveling for business or for pleasure?" 
It's the most common way of phrasing the question here in the US and I believe a few other English-speaking countries.

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