You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Edwards.

ASSISTANT: How can I help you today?

USER: I want to change my reservation as my farewell got postponed. Can you help me?

ASSISTANT: Please standby, I will revert to you.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found on your name.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for opting us.