You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to change my previous reservation, can you help me?

ASSISTANT: Sue, can I have your good name please?

USER: My name is Stephanie Carter.

ASSISTANT: There is no reservation found on your name, Carter.

USER: That's fine. Anyway, thank you for your help.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.