Panadda Sajjavetha from The Shell Company of Thailand wrote to Yongyos Khongchana at DTAC to thank them for the warm welcome during their visit to DTAC's call center on November 28, 2007. Sajjavetha conveyed their appreciation for the interesting experiences and asked Khongchana to thank the entire call center staff. Khongchana replied, thanking Sajjavetha for the visit and expressing their wish to improve service and support for Shell in the future.