You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Eric Harris here.

ASSISTANT: How may I aid you?

USER: Please help me out in booking the ticket from DEN to DFW.

ASSISTANT: Sure, I am glad to help you. Could you please share your travel dates?

USER: My planned trip dates will be Mar 18 to Mar 20.

ASSISTANT: May I know your connection limit?

USER: 1 connected flight I will prefer.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any class specifications?

USER: No, I am comfortable with any flight.

ASSISTANT: Do you have any requirements?

USER: My return time must be in the morning.

ASSISTANT: Sorry, there are no flights found on your travel dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.