You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: Suddenly I got a call from my project manager to attend a meeting on the same date which I have planned to enjoy my holiday, so I am looking to change my travel dates. Can you please help me in changing the details?

ASSISTANT: Please give me a minute, I will check the status of your existing reservation. May I know your name?

USER: Thank you for accepting my request. My name is Ashley Lewis.

ASSISTANT: I am sorry Ashley, there are no existing reservations with your name.

USER: It's ok, not a problem with that one. Anyways, thanks a lot for checking my ticket status.

ASSISTANT: Thank you, have a great day.

USER: Welcome.