You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: Can you aid me to change my reservation due to an emergency?

ASSISTANT: Sure, I am here to help you with this. Can you please provide your name to check your reservation status?

USER: Elizabeth Baker here.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for choosing us.