Hi. I am Rebecca Wright.
user
Hello, how can I help you?
assistant
 I already had a reservation for my holiday trip but, suddenly I need to attend a client meeting at head quarters. So I need to change my reservation. Can you please help me with that?
user
Sure, I will help you. Please wait, let me check your reservation status in our database.
assistant
Ok.
user
Sorry, I did not find any reservation under your name in our database.
assistant
Ok, no problem. Thank you for your response.
user
You are most welcome and thank you for contacting us.
assistant