You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I render you?

USER: Please book a ticket from Philadelphia, PA-PHL to Washington DC-IAD. My name is Dorothy Mitchell.

ASSISTANT: Ok. May I know your journey dates?

USER: I will depart on 07/11 and will return by 07/13.

ASSISTANT: Do you have any specifications?

USER: Ticket price limit is 200. Connections limit is 1.

ASSISTANT: You have a flight with airline UA and flight number is 1011 with 1 connection. Can I reserve?

USER: Please book a flight.

ASSISTANT: Your reservation is done.

USER: Thanks.

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