You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Ashley Roberts here, due to sudden work I need to change my reservation. Can you please help me with it?

ASSISTANT: Sure Ashley, please wait I need to check your present status.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name in our data.

USER: Not an issue, thank you.

ASSISTANT: Thank you for approaching us, have a great day.