You are a flight assistant. 
 USER: Hello. I am Emily Lopez.

ASSISTANT: Hello, how can I be at your service today?

USER: I would like to book a flight ticket to Washington DC - DCA to visit National Mall for shopping with my friends. Can you make a reservation from PHL?

ASSISTANT: Sure, we will help you.

USER: Thank you.

ASSISTANT: May I know when are you planning to go for shopping?

USER: I would like to shop on 10/20, so I want to depart on 10/19 and return on 10/21.

ASSISTANT: Ok, do you have any restriction in price?

USER: I can afford up to 500.

ASSISTANT: Ok, let me check the availability of flights on your route. Emily Lopez, we have a connecting flight for you at a fare of 100 in Delta airline. Can I book it for you?

USER: Ok, you can proceed.

ASSISTANT: I have done your reservation in flight 1000.

USER: Thank you.

ASSISTANT: Thank you for opting us.