You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Katherine Clark.

ASSISTANT: How can I assist you?

USER: Already I have a reserved ticket but I want to change my reservation locations know, can you please help me out?

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: I am sorry to say that there is no reservation found on your name.

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

ASSISTANT: Thank you for contacting us.