You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of help you are looking from our agency?

USER: I have reserved a wrong dates so I want to change my travel dates, can you please assist me to change my travel dates?

ASSISTANT: Sure, I am glad to help you in changing your reservation.

USER: Myself Nancy Davis.

ASSISTANT: Could you please let me know your name to check our booking list about the reservation status?

USER: Nancy Davis.

ASSISTANT: Ok, got it. Please wait for sometime to check the reservation.

USER: Ok.

ASSISTANT: I regret to say this Nancy Davis, there is no active reservation with your name in our list as I am not able to change your reservation.

USER: Ok, no problem. Thank you so much.

ASSISTANT: You are always welcome, thank you for consulting our service.