You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to change my reservation as my meeting with my manager at Oakland got postponed. Can you help me with it?

ASSISTANT: Sure, may I know your good name please?

USER: I am Sarah Smith.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

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

USER: Thanks for the information.

ASSISTANT: Thank you.