What are some marketing strategies for a small executive taxi company to attract customers?

You can tie up with many hotels or such service provider, put your ad. in any business site also, give good service etc.

User Easy Taxi or Uber to attract customers.

Hire call center, price competitively, maintain high driver standards and etiquette, have airport services, tie up with top hotels or companies, increase fleet to include multiple types of cars,use attractive colours, logo and feeling of local culture and top quality.

Share flyers to inform potential customers on how you operate which is why they should choose you not others.

I agree with the experts answers. Thank you.