You are a flight assistant. 
 USER: Hi, my name is William Wright.

ASSISTANT: Hello. How could I aid you today?

USER: I have planned to visit Columbia River Gorge with my friends at Washington, will you help me in booking a flight within a fare of 5000?

ASSISTANT: Sure, I will be happy to help you in booking.

USER: Thank you.

ASSISTANT: May I know when you are planning to depart and arrive?

USER: I want to depart on 03/02 and intend to arrive on 03/04.

ASSISTANT: Could you please share me your journey locations?

USER: My airport codes are from TX - DFW to DC - DCA.

ASSISTANT: Do you need any flag stop in between your journey?

USER: Yes, I prefer it.

ASSISTANT: Just hold on a moment, let me check with the airlines and revert to you.

USER: Ok, I will wait.

ASSISTANT: There is a flight found with an airline UA of flight 1015 and fare is 100 which matches your given requirements.

USER: That suits me, you can confirm with it.

ASSISTANT: Your reservation has been done successfully.

USER: Thank you so much.

ASSISTANT: Thank you for choosing us.