You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid you?

USER: I want to change my reservation as my plan to visit Phoenix is postponed. Can you help me with that?

ASSISTANT: Sure, May I know your name?

USER: My name is Emily Jones.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you.