You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you now?

USER: I need to change my reservation due to urgent meeting, can you help me?

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

USER: I am Ruth Adams.

ASSISTANT: Thank you for your name, sorry there is no reservation found on your name in our system data.

USER: That's ok. Thank you for help.

ASSISTANT: Thank you for visiting us, we hope see you again.