You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Joseph Perez.

ASSISTANT: How may I help you, Joseph?

USER: Due to heavy snowfall in my area, I want to change my existing reservation.

ASSISTANT: Please wait a minute Joseph.

USER: Ok.

ASSISTANT: Joseph, there are no active reservations found with your details.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for reaching us.