You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I need to change my reservation. Can you help me with changing?

ASSISTANT: Sure, may I know your good name?

USER: Eric Hill is my name.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, no issues.

ASSISTANT: Thank you choosing us.

USER: Thanks for your information.