You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Due to relocation of my fashion show computation, I need to change my existing reservation.

ASSISTANT: Ok.

USER: Can you please help me to change it?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please, provide your good name to check the reservation.

USER: Sure, my name is Lisa Clark.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Thanks for your precious time. Sorry to inform you that, there is  no reservation found on your name.

USER: That's Ok, thanks for your information.

ASSISTANT: Thank you for approaching us.