Translation of fiabilidad in Spanish-English

The connecting flight to Phuket was fully booked, and the connection to Krabi had five empty seats. The problem was that the boarding began in ten minutes and I did not even have a ticket.
Sorry, I did not know that I have a meeting with a friend. I will talk about our trip. Many thanks for the email and I hope we write eachother again soon and next time longer letters, I promise.
I can already speak a little English but not too well. So I'm more cautious about making mistakes. I want to improve my English, because it is also good for your confidence and communication skills.