You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I serve you?

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

ASSISTANT: Sure, let me know your good name to proceed further.

USER: I am Raymond Baker.

ASSISTANT: Thank you. Please wait a while.

USER: Sure.

ASSISTANT: Thank you for your time. Unfortunately there is no reservation found according to your name.

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