You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I address you today?

USER: Please change my existing reservation owing to an emergency.

ASSISTANT: Sure, I'll help you in changing an existing reservation. Could you please let me know your name to check the reservation status?

USER: I am Amanda Clark.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation found by this name.

USER: Thanks.

ASSISTANT: Thank you for opting us.