You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Can you please change my reservation as my plan to go for holiday trip got postponed?

ASSISTANT: Sure, may I know your name?

USER: I am Mary Hill.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

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

ASSISTANT: Thank you for reaching us.