You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: As the art festival which I want to attend got postponed, I want you to change my reservation. Can you please help me?

ASSISTANT: Sure, can you help me with your name.

USER: Stephen Lee is my name.

ASSISTANT: Thank you for your details. Sorry, we did not found any reservation on your name.

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

ASSISTANT: Thank you for reaching us.