You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Owning to an emergency, I want to change my existing reservation. Can you please help me with this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please to check the status of your reservation?

USER: Sure, my name is Catherine Jackson.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Catherine Jackson, there is no active reservation has been found on your name in our records.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for approaching us.