You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be of your helping hand today?

USER: I am Angela Smith. I am planning to visit Millennium Park at Chicago, could you please help me with booking a flight ticket from DCA to ORD?

ASSISTANT: Sure, can you please let me know your depart and arrival dates of the journey?

USER: I would like to depart on Jan 13th and return on Jan 15th.

ASSISTANT: Can you please mention your class limit?

USER: I am comfortable with any class.

ASSISTANT: Do you prefer connecting or direct flight in your journey?

USER: I am looking for a connecting flight.

ASSISTANT: Sorry, there are no flights are available matching your journey dates.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.