You are a flight assistant. 
 USER: Hello, Samuel Edwards here.

ASSISTANT: Hello, how best I can 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, please wait.

USER: Ok.

ASSISTANT: Sorry, we do not found any reservation with your provided name.

USER: Ok, no problem.

ASSISTANT: Thanks for approaching us.

USER: Thanks for the information.