This letter expresses your approval of the services of a travel agency that has been particularly helpful or resourceful
1234, Main Street
Boston, MA 02123
01 April, 2005
<Recipient Address Goes Here>
<time you dealt with agency> <travelers> arranged <arrangements> through <agency name>. <I/We> <was/were> very pleased with the work of your company, and I thought I should write to express my satisfaction.
It's a pleasure to work with a travel agency that seems so committed to meeting the needs of the customer. Thank you again, and I look forward to doing business with you in the future.
encl: <List of enclosed items goes here>