You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jennifer Lewis.

ASSISTANT: Jennifer Lewis, how may I assist you today?

USER: I would like to change my existing reservation, due to hurricanes my planning to meet my grand parents has been postponed.

ASSISTANT: Sure, I will help you. Please allow me a minute.

USER: Sure.

ASSISTANT: Jennifer Lewis, I am really sorry to inform you that there is no booking done on your name.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you for reaching us. Have a great time.