Suppose that you are the president of the Sightseeing Club, Bangkok University.
You and the committee are planning to organize a guest lecture for students who are interested in tourism on Tuesday, July 19.
One of the speakers you have planned to invite is Mr. Kittisak Rungsiri, the manager of TM International Travel, 860 Si Ayuthaya Rd., Rajthevee, Bangkok 10400.
Write an informal invitation to Mr. Kittisak Rungsiri, asking him if he could give a 40-minute lecture to the students on the topic 'International Tourism' followed by a 15-minute-question-and-answer period.
The lecture will be held at the Chaiyapruk Room, Bangkok University, City Campus at 9:30 a.m. Inform him to send his reply before June 30. Use modified block with standard punctuation.