You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Paul Mitchell.

ASSISTANT: Paul, how can I assist you today?

USER: I am looking for a direct flight from CLT to DEN to meet my college friend.

ASSISTANT: Sure, can you please let me know your journey dates?

USER: Sure, I want to go on 11/30 and return on 12/02.

ASSISTANT: Ok, I am checking for the best fight to DEN.

USER: Sure, take your time.

ASSISTANT: Sorry Paul, I have not found any flight to DEN on your preferred dates.

USER: No problem, thank you for checking.

ASSISTANT: Thank you so much for contacting us and have a nice day.