You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in changing my existing reservation to Oakland? As my meeting got postponed at Oakland.

ASSISTANT: Sure, let me know your travelling dates. Sorry, may I know your name?

USER: My previous reservation has done with the name Laura Thomas.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for choosing us.