You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffrey Parker.

ASSISTANT: How can I aid you?

USER: I am planning to attend music concert at DFW, can you please help me with booking a flight ticket from DFW?

ASSISTANT: Sure, I will help you. May I know your journey dates?

USER: Sure, I would like to take off on Aug 17 and return on Aug 19.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a flight with 1 connection.

ASSISTANT: Please recheck your airport codes.

USER: Yes, my source airport code is IAD and the destination airport code is DFW. I would like to depart during afternoon time.

ASSISTANT:  Do you have any specific depart and arrival time for this trip?

USER: Yes, as I mentioned above.

ASSISTANT: Thanks for your details. There are no flights found in the afternoon time.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you.