You are a flight assistant. 
 USER: Hello, I am Kenneth Moore.

ASSISTANT: Hello, how can I best assist you now?

USER: I want to change my journey date as my plan to visit Washington is postponed, can you help me with changing the reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

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

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thanks for opting us and have a nice day.

USER: Thanks for the information.