You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Barbara Lopez, I want to change my reservation as my plan to meet my friend is postponed.

ASSISTANT: Ok.

USER: Can you help me with that?

ASSISTANT: Sure, please standby.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not find any reservation with your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for approaching us.