You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Benjamin Evans. I would like to change my recent reservation because my trip dates are postponed, can you help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Give me a minute, I will check and let you know the reservation status.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for approaching us.