You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, can you please tell me how can I aid you?

USER: I was looking for a flight from Denver DEN to Charlotte CLT to meet my brother, can you assist me?

ASSISTANT: May I know your trip dates?

USER: I will be flying on 04/19, I would like to come back on 04/21.

ASSISTANT: May I know your name?

USER: Jerry Brown.

ASSISTANT: Sorry Brown, no flights found with your dates.

USER: Ok, no problem with it. Anyways, thank you for checking.

ASSISTANT: Most welcome.