You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nancy Thomas here.

ASSISTANT: In which way I can help you today?

USER: I need your help in booking of a flight ticket from DCA to PHL for an important business meeting, can you please help me out with booking of a flight ticket on those locations?

ASSISTANT: Sure, I will help you in booking flight ticket.

USER: Thank you.

ASSISTANT: Could you please mention your preferable travel dates for booking flight ticket?

USER: Sure, I am planning to leave on 07/23 and please book my return ticket on 07/25.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Sure, take your time but try to bring a best flight in my route. Please make sure that flight should be with connection 1.

ASSISTANT: Sure. Sorry no flights available in this route as per your requested limit.

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

ASSISTANT: Thank you for contacting us, have a good day.

USER: Welcome.