Dear :

Thank you for agreeing to participate in our survey.

We have enclosed the questionnaires to be filled out by each member of your household, eighteen years of age and older. Please return the questionnaires by placing it in the envelope provided. No postage is necessary.

We sincerely appreciate your cooperation. Your responses will be crucial to our endeavor to improve our customer services.

Sincerely yours,

[name]

[title]