You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be of your helping hand?

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

ASSISTANT: Sure, may I know your name to change your details?

USER: Ruth Green here.

ASSISTANT: Wait a while, kindly.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found for the user name in our data base to change your previous booking.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.