You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I want to change my current reservation due to heavy rains in Atlanta, can you help me please?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: My name is Debra Martinez.

ASSISTANT: Sorry, there is no reservation found with your name to change your existing reservation.

USER: That's ok, thank you for assisting me.

ASSISTANT: Thank you for choosing us.