You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Please help me to change my recent reservation.

ASSISTANT: Sure, may I know your name to check your reservation from our database?

USER: Kimberly Phillips.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We regret to inform you that there is no reservation found on your name.

USER: Thank you for your information.

ASSISTANT: Thank you for contacting us.