You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a flight from DFW to DEN. Can you help me with booking?

ASSISTANT: Sure, I am here to help you out. May I know your travel dates please?

USER: I will fly on Apr 27 and return on Apr 29.

ASSISTANT: Can you please share your connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other specification?

USER: I want my return flight in afternoon.

ASSISTANT: May I know your travel dates please? May I know your name please?

USER: I will fly on Apr 27 and return on Apr 29. My name is James Hernandez.

ASSISTANT: Steven Collins, there are no flights available in your route with your preferences.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.