You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I am Christine Lewis.

ASSISTANT: Ok.

USER: Please change my existing reservation because I have reserved with another airport due to confusion.

ASSISTANT: Sure, please wait for a while, let me check your reservation and back to you.

USER: Sure.

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

USER: Ok, Thank you for the quick response.

ASSISTANT: Thank you for choosing us.