You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Brandon Scott.

ASSISTANT: Thank you for providing your name.

USER: Please book me a ticket with the fare of 200 to meet my friends at Washington.

ASSISTANT: Could you please mention your corresponding airport locations?

USER: My airport codes are from OAK to DCA.

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

USER: Yes, I need a halt.

ASSISTANT: When you are planning to depart and return?

USER: I have planned to travel on 08/11 and 08/13.

ASSISTANT: Just hold on a moment, let me check the details of flight and revert to you.

USER: Ok.

ASSISTANT: Unfortunately there is no flights found with your matching details in our database.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.