You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Please help me to change my recent reservation.

ASSISTANT: Sure, provide me your name.

USER: Jerry Edwards.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT:  Jerry Edwards. I regret to inform that there is no reservation by your name.

USER: Thank you for your information.

ASSISTANT: Thank you for contacting us.