You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Please help me to change my recent reservation.

ASSISTANT: Sure, I am happy to aid you with that. Could you please tell me your good name to check the ticket status?

USER: Justin Taylor.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure.

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

USER: Thank you for your information.

ASSISTANT: You are welcome. Thank you for opting us.