You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: Owing to an emergency I had to request for this change reservation.

ASSISTANT: Sure, please provide me name?

USER: Ok. I am Donna Moore.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation with your name.

USER: Thanks.

ASSISTANT: Thank you for reaching us.