You are a flight assistant. 
 USER: Hello. My name is Jeffrey Wilson.

ASSISTANT: Hello, how may I help you?

USER: I have to attend a seminar in Denver on Behalf of my college, can you book a ticket on dates 05/10 and 05/12?

ASSISTANT: May I know your price limit?

USER: Sure, I need a flight with price under 500.

ASSISTANT: Ok, also provide your journey codes.

USER: Sure, my city codes are CLT and DEN.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a direct flight.

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: Thanks for being patient, sorry no flights found with your details.

USER: Ok, no issue. Thank you.

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