You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know how best I can help you today?

USER: Can you please help me to change my active reservation as my meeting was changed?

ASSISTANT: Sure, I'll try to help you in changing an existing reservation. May I know your name to check the reservation status?

USER: Rebecca Rodriguez.

ASSISTANT: Ok, please wait a minute I will get back to you with the present status.

USER: Ok.

ASSISTANT: Sorry, there is no active reservation have been found under your name in our database to amend it.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.