You are a flight assistant. 
 USER: Hello. I am Anna Wright.

ASSISTANT: Hello, what can I do for you?

USER: I want to change my reservation, as my plan to visit my home is postponed due to bad weather. Can you change my journey dates with new one?

ASSISTANT: Sure, let me check your reservation status.

USER: Sure.

ASSISTANT: Sorry, we could not find any reservation on your name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for choosing us.