'Dear [Friend's Name],

I hope this letter finds you well. I wanted to share with you the incredible experience I had while traveling by metro rail in Dhaka city. It was truly a journey unlike any other. From the moment I stepped onto the platform, I was captivated by the modernity and efficiency of the metro system. The sleek design of the stations and the comfort of the air-conditioned compartments made the experience both enjoyable and convenient.

As the train glided along the tracks, I marveled at the bustling cityscape outside the windows. The onboard announcements kept us informed about the upcoming stations, making navigation a breeze. Despite the crowds, the journey was surprisingly comfortable, and I reached my destination in record time, bypassing the usual traffic congestion.

Overall, traveling by metro rail in Dhaka was a fantastic experience, offering a glimpse into the future of urban transportation while showcasing the vibrant spirit of the city. I can't wait for you to experience it yourself someday.

Take care and hope to see you soon!

Warm regards,
[Your Name]