You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help is required from my end?

USER: I am planning to visit Liberty Bell in Philadelphia which is a historical symbol of American freedom. Can you please assist me to search a flight from Washington, DC-DCA?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for your positive response.

ASSISTANT: Can you please let me know your travelling dates?

USER: Sure, I want to spend my whole day in Liberty Bell on 04/26. So the departure date is 04/25 and the return date is 04/27.

ASSISTANT: Could you please provide the airport code of Philadelphia?

USER: The landing airport code of Philadelphia PA-PHL, where I am expecting my friend to pick me pick.

ASSISTANT: May I know your name to proceed further?

USER: Sure, my name is Steven Jackson.

ASSISTANT: There is a flight in Frontier airline with price 100.

USER: Yes, proceed with my booking.

ASSISTANT: Your ticket has been booked with flight number 1003.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.