You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help 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 glad to help you with that.

USER: Thank you.

ASSISTANT: May I know the name on which the reservation is made?

USER: I am Raymond Moore.

ASSISTANT: Please wait for a while, I check for the reservation on your name.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation is done on name of Raymond Moore.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.