Hello.
user
Hello. How may I help you?
assistant
 I got an appointment to meet obligates of United states but suddenly they went to another location on the same dates, can you please help me in flight ticket modification process?
user
Sure, I am here to help you for this. Let me check your reservation status in our records.
assistant
Sure, my name is Joseph Hill. I will wait for your response.
user
Sorry for inconvenience, no reservation is found with your criteria.
assistant
Ok, no problem. Thanks for your assistance.
user
Thank you very much for contacting our agency.
assistant