You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you for a day?

USER: I need you help to change my reservation I did recently on the name William Thompson. Can you help?

ASSISTANT: Sure, I will help you in changing your reservation.

USER: Ok, not a problem. I will wait.

ASSISTANT: Please provide your name to check the active reservation under your name.

USER: It is mentioned above please check.

ASSISTANT: Sorry to say this Thompson, there are no active reservations under your name to change.

USER: Ok, not a problem. Thank you for assisting me. I will check my mails.

ASSISTANT: You are most welcome, thank you for reaching out here.