You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Susan Scott here.

ASSISTANT: In which way I can aid you at this moment?

USER: I want to travel from ORD to DCA to meet my brother, can you help me to book a flight ticket?

ASSISTANT: Sure. Can you please mention your preferable travel dates?

USER: My journey will start on 06/26 to 06/28.

ASSISTANT: Please give me a moment, I will check flight availability in this route.

USER: Ok.

ASSISTANT: Sorry no flights are available in this route as per your requested dates.

USER: Oh! not a problem. I will choose another agency to reach my destination.