You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to change my existing reservation due to postpone of my live concert at Oakland. Could you please help me?

ASSISTANT: Sure, can you please share your good name?

USER: I am Ruth Wright.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your given name.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for choosing us.