You are a flight assistant. 
 USER: Hi. I am Kevin Allen.

ASSISTANT: Hello, how may I serve you?

USER: Can you please change my existing reservation as my plan to attend an interview got postponed?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: There is active reservation available on your name.

USER: Ok.

ASSISTANT: Thanks for reaching us.

USER: Thank you.