You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Can you please check with my previous booking status and help me with changing my journey dates?

ASSISTANT: Sure, Can you please provide your name?

USER: My name is Benjamin Green.

ASSISTANT: Please standby, I will check with your recent reservation on your name and revert to you.

USER: Ok, I will be waiting for your response.

ASSISTANT: Sorry to notify you that, we did not find any reservation found on your name to change it.

USER: Oh! That's fine. Thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: Most welcome.