You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need to change my recent reservation, due to some issues, can you help me?

ASSISTANT: Sure, I am happy to help you. Please let me know your good name.

USER: I am Ryan Adams.

ASSISTANT: Sorry, there is no active reservation on your name in our data.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.