You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephanie Brown.

ASSISTANT: How may I assist you for the day?

USER: I need to change my recent reservation due to postpone of my reception to 08/26. Could you please help me in doing that?

ASSISTANT: Sure, please standby.

USER: Ok.

ASSISTANT: Thank you for your time. Sorry, we did not find any active reservation in your name.

USER: No problem, thank you for your valuable information.

ASSISTANT: Thank you for reaching us. Have a nice day.