You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Samuel Young. Can you book me a flight ticket from Washington DC - DCA to Philadelphia, PA - PHL?

ASSISTANT: Sure, do you have any price limit?

USER: Yes, my price limit is 1000.

ASSISTANT: May I know on which dates you would like to travel?

USER: Sure, I am willing to travel on 02/17 and intend to return on 02/19.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for your time, we found a flight in an airline: UA, number: 1009, price:700, connection:1. Shall I proceed to confirm?

USER: Ok, proceed. Thank you.

ASSISTANT: Your flight ticket is done with the booking. Thank you for reaching us.