You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

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

ASSISTANT: Sure, may I know your good name?

USER: I am Justin Perez.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name in the database.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.