You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you now?

USER: I am have to attend an interview on my planned journey dates. Can you help me in changing my existing reservation?

ASSISTANT: Sure, I will help you with that. May I know your name for checking previous the reservation status?

USER: Please check with the name Paul Collins.

ASSISTANT: Sorry, there is no reservation found on your name .

USER: That's fine, thank you for the information.

ASSISTANT: Thank you for approaching us, have a nice day.