You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Due to an emergency, I want to change my reservation. Can you help me?

ASSISTANT: Sure, we are perky to help you. May I know on which name the ticket has been reserved?

USER: I am Dorothy Smith.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to inform you that, there is no reservation found with your name.

USER: No issue, Thanks for the information.

ASSISTANT: Thank you for opting us.