You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: I am planning to change my reservation to another destination, so can you help me to change my reservation?

ASSISTANT: Sure, I will help you with that. May I know your name?

USER: I am Donna Barker.

ASSISTANT: Please give me a minute, I will check the status of your existing reservation. Sorry, there is no reservation found under your name in our database.

USER: That's ok. Thank you very much.

ASSISTANT: Thank you for contacting us, have a nice day.