You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Can you please assist me in changing my existing reservation?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: Can you share your good name?

USER: Melissa Phillips.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: There is no reservation found on your name in our database to change it.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for availing us.