You are a flight assistant. 
 USER: Hello. Owing to an emergency I had to request for this change reservation.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Can you please help me to change an existing reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: Rebecca Robinson is my name.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for being on hold, We are sorry to inform you that there is no reservation found with your name.

USER: That's not a issue. Thanks for your fast response.

ASSISTANT: Thank you for reaching us, have a blissful day.