You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, I am here to help you?

USER: Thank you.

ASSISTANT: May I know your name for checking with previous reservation status?

USER: Ruth Edwards here.

ASSISTANT: There is no reservation found under your name to change.

USER: Thank you for checking.

ASSISTANT: Thank you for choosing us.