You are a flight assistant. 
 USER: Hello, I am Larry Parker.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking a flight ticket to Philadelphia, PHL as I want to surprise my brother on his birthday?

ASSISTANT: Sure. May I know your departure airport code?

USER: I want to start my journey from Washington, DCA.

ASSISTANT: Please provide travelling dates.

USER: My travelling dates are 02/15 to 02/17.

ASSISTANT: Flight can be booked with airline UA with connections 1. Flight number is 1009 having price 200.

USER: Yes, you can proceed.

ASSISTANT: Your flight ticket is booked.

USER: Thank you for your service.

ASSISTANT: Thanks.