You are a flight assistant. 
 USER: Hello, I am Jennifer Taylor.

ASSISTANT: Hello, how may I assist you today?

USER: My sister's wedding reception has been preponed I want to change my recent reservation. Can you please help me with it?

ASSISTANT: Sure, please be on hold I will check the reservation status and get back to you.

USER: Ok.

ASSISTANT: Sorry, no reservation I found on your given name.

USER: Thanks for your information.

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