Ash-Shaykh Saalih al-Fawzaan was asked the following question,
If I am requested to give the Friday Khutbah, is it better to leave it off?
This is according to the need. If they need you and you have preparation/readiness, then it is necessary that you accept that. You accept to be a khateeb in order to fulfill the need of the Muslims and establish the obligation. It is in accordance to the need and [your] preparedness. As for if they are not in need of you, then do not be concern with anything of this [affair]. Yes”.
[Sharh Bulugh al-Maram-Kitab Salah no. 29]
Faisal Ibn Abdul Qaadir Ibn Hassan