Hi, I am Mark Jones.
user
Hello, good morning. How can I help you?
assistant
Recently, I had booked a ticket to visit my son's college who is studying in other city, but, due to some reasons I could not go on that dates,  I need to change my reservation. Can you help me?
user
Sure, Just be on hold.
assistant
Sure.
user
Thank you for waiting.I found no reservation under your name.
assistant
Ok, thank you for your help in finding.
user
Thank you for contacting us, have a nice day.
assistant
Thank you.
user