You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Can you aid me to change my reservation due to emergency?

ASSISTANT: Sure, I am gleeful to help you with that. May I know your name please?

USER: Angela Robinson here, thank you positive response.

ASSISTANT: Please wait for a moment, let me check your previous reservation status.

USER: Ok.

ASSISTANT: Thank you for waiting. There is no active reservation found on your name in our database to change it.

USER: Thank you for the help.

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