You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Karen Williams.

ASSISTANT: How may I guide you?

USER: For some issues I want to change my locations, can you please help me in changing my reservation locations?

ASSISTANT: Sure, wait a moment. Sorry Williams, no reservation has been found on your name.

USER: It's fine. Thank you for the information.

ASSISTANT: Thank you for approaching us.