You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: As my plan to go for vacation trip got postponed.Can you please change my reservation?

ASSISTANT: Sure. May I know your good name?

USER: I am Edward Nelson.

ASSISTANT: Wait a while.

USER: Ok.

ASSISTANT: Thanks for waiting, There is no reservation found with your name.

USER: It's ok, thank you for the information.

ASSISTANT: Thanks for choosing us.