You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit Olympic National Park at Washington, could you please help me with booking a flight ticket from DFW to IAD?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: I would like to depart on Aug 25th and return on Aug 27th.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your good name please?

USER: I am Richard Miller.

ASSISTANT: We found Spirit airline with economy class and flight number is 1028 with arrival time is 5:00 hours and depart time is 18:00 hours.Shall I proceed for booking?

USER: Make sure that my depart time must be evening and return time must be morning.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no flight available for your request.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.