You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Sandra Rodriguez. Can you please help me in changing recent reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Ok, take your own time.

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

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you.