You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephen Jones.

ASSISTANT: How can I help you?

USER: Due to bad weather conditions, I am planning to change my reservation. Can you help me out?

ASSISTANT: Sure Stephen Jones, please wait a moment.

USER: Ok.

ASSISTANT: Sorry Stephen, there is no reservation found in my database on your name.

USER: It's fine. Thank you for your help.

ASSISTANT: Thank you for your positive response. Thank you for approaching us.

USER: You are welcome.