You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to change my existing reservation due to postpone of my shopping for wedding. Could you please help me?

ASSISTANT: Sure, can you provide your name for checking the reservation status?

USER: I am Briann Edwards.

ASSISTANT: Sorry, there is no reservation with your name.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for reaching us.