You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Anna Nelson here. I would like to change my recent reservation, can you help me with this?

ASSISTANT: Sure, I am happy to help you. Please wait, I will check your reservation status and get back to you.

USER: Sure, take your own time.

ASSISTANT: Nelson, I have not found any reservation on your name in our database.

USER: That's fine, not a issue. Thanks for your information.

ASSISTANT: You are welcome and thank you for choosing us.