You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Ashley White.

ASSISTANT: How may I help you?

USER: Due to change in the date of event, I would like to change my existing reservation. Can you help me?

ASSISTANT: Sure, I will help you. Please hold on a moment.

USER: Ok.

ASSISTANT: Ashley, no reservation has been found on your name in our records.

USER: Its ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing our service.