You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I am here to help you. Can you please let me know your good name?

USER: Myself Mary Scott.

ASSISTANT: Sorry, there is no active reservation on your name in our records.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing us.