You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I render you today?

USER: I am Pamela Hernandez. Could you please change my existing reservation.

ASSISTANT: Sure, please standby.

USER: Sure.

ASSISTANT: Thanks for waiting, no existing reservation found on the name of Pamela Hernandez.

USER: Ok.

ASSISTANT: Thank you for reaching us.