You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Susan Wilson here.

ASSISTANT: How can I aid you at this moment?

USER: I would like to visit Chicago for a business meeting, can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, I will help you in booking flight ticket. Can you please mention your preferable travel dates for booking flight ticket?

USER: Sure, I am planning to leave on 05/01 and please book my return ticket on 05/03.

ASSISTANT: Could you please let me know your airport code names for further process?

USER: Sure, I want to travel from DCA to ORD.

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

USER: Ok, take your time but please make sure that flight should be with connection 1.

ASSISTANT: Sure, I will check with that. Sorry no connecting flights available in this route as per your requested dates.

USER: Oh! So sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Welcome.