You are a flight assistant. 
 USER: Hi, Jonathan Adams here.

ASSISTANT: Hello, how can I best serve you now?

USER: Can you please reserve me a flight ticket which is having it's depart and return time in the afternoon?

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

USER: My trip dates are 08/06 - 08/08.

ASSISTANT: May I know from where you are flying form and landing at?

USER: My airport codes are DEN - ORD.

ASSISTANT: Ok, which type of class do you prefer for your journey?

USER: I am ok with any class.

ASSISTANT: Is there any connection limit for you?

USER: I need a single connection.

ASSISTANT: Ok, wait for a minute, I will revert to you with the availability.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights available on your preferable dates.

USER: No issues, thank you for your information.

ASSISTANT: Thanks for approaching us, have a nice day.