You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Dorothy Turner.

ASSISTANT: How may I help you?

USER: Could you please help me in changing my recent reservation as I my plan to attend a meeting got postponed?

ASSISTANT: Sure, please hold on a minute.

USER: Sure.

ASSISTANT: Sorry, we did not find any reservation in your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing with us.