You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to change my reservation to next week?

ASSISTANT: May I know your name please?

USER: Sure, my name is John Williams.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for opting us.