You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I have planned to go for fashion show in DFW unfortunately the show was postponed, can you please help me out by changing the existing reservation?

ASSISTANT: Sure, can I know your name for checking the details?

USER: My ticket is reserved on Barbara Carter.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: Yes, I have checked your details. But there is no reservation found with your details.

USER: Ok, fine. Thank you for your information.

ASSISTANT: You are welcome.