You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Steven Perez.

ASSISTANT: How can I assist you?

USER: I am planning to travel from DCA to ORD, can you help in that flight?

ASSISTANT: I will help with the booking of ticket, may I know the journey dates?

USER: My date of travelling is on 11/16 to 11/18.

ASSISTANT: There is a flight available with the price range of 600 and 1 connection limit. May I proceed?

USER: Ok, please book.

ASSISTANT: Ok, the ticket is booked. The flight number is 1003.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing our service.