You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, May I know, how can I best assist you now?

USER: I am Rebecca Roberts.

ASSISTANT: Ok.

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

ASSISTANT: Sure, we are here to help you. Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation found on your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for availing us.