I used this company to go from Kathmandu to Pokhara. The bus leaves at 7:30am just in front of the greenline office - it’s recommended to book in advance. It’s very expensive - paid 2800 rupees, Greenline charges more because the ticket includes lunch in a special riverside resort and stops there for 40minutes (the other tourist buses stop at a restaurant by the road where you can buy a meal yourself)...