You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I am Elizabeth Green. I need to change my recent reservation due to my event got postpone to 06/14. Could you please help me in doing that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait a moment I will check the status and get back to you.

USER: Sure.

ASSISTANT: Sorry to inform, no reservation found with your name.

USER: No worries, thank you for your information.

ASSISTANT: Thanks for opting us.