You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Due to heavy rains, I would like to change my existing reservation.

ASSISTANT: Please can I know your name?

USER: My name is Eric Roberts.

ASSISTANT: There is no reservation found under your name.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.