You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Karen Edwards.

ASSISTANT: How should I assist you at this right moment?

USER: Due to rainy season, I want to change my existing reservation.

ASSISTANT: Sure, I am here to help you. Please give me a moment.

USER: Sure.

ASSISTANT: Thank you for your patience. Sorry Karen, there is no reservation has found under your name. Thank you for reaching us.

USER: Ok, thank you for your information.

ASSISTANT: You are welcome, have a good day.