You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I have to change my reservation as I have to prepare for my exams, can you please help me?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: May I know your name please to check the status of your reservation?

USER: My name is Rebecca Allen.

ASSISTANT: Please hold on a moment.

USER: Ok.

ASSISTANT: Rebecca Allen, no reservation has been found on your name in our database.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for choosing us.