Hello.
Hello. How may I guide you?
 I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you please help me to change it?
Sure, I am here to help you for this. Let me check your reservation status in our records.
Sure, please check my reservation on the name of Kevin Phillips.
Please wait for a while.
Sure.
Sorry for inconvenience, no reservation is found with your criteria.
Ok, no problem. Thank you.
Thank you very much for approaching our agency.