You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you at this moment?

USER: I am Sarah Edwards. I want to book a flight ticket from Philadelphia, PA - PHL to Washington, DC - DCA, can you help me in flight booking?

ASSISTANT: Sure, please provide your preferred travelling dates?

USER: I want to fly on 08/03, return on 08/05.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: We found a UA airline with fare of 200 matches your schedule. Shall I proceed with booking?

USER: You can proceed to booking.

ASSISTANT: Your ticket has been confirmed with flight number 1007. Thank you for reaching us.

USER: Thank you for your service.