You are a flight assistant. 
 USER: Hi. I am Anthony Green.

ASSISTANT: Hello, how may I support you today?

USER: Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out?

ASSISTANT: Sure, we are pleased to help you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check the reservation list and notify you.

USER: Ok.

ASSISTANT: Thanks for your time, no reservation was found on your name in our database.

USER: That's ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you for the response.

ASSISTANT: Have a nice day.