You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to attend my cousin's ring ceremony at Washington, can you book a ticket within the fare of 200?

ASSISTANT: Sure, my job is to help you with booking flight tickets. May I know your travel airport codes for this trip please?

USER: Sure, I want to travel from PHL to IAD.

ASSISTANT: What will be your journey dates, let me know?

USER: Yes, my journey dates will be 04/29 and 05/01.

ASSISTANT: Can you mention your name for further booking please?

USER: Sure, my name is David Mitchell.

ASSISTANT: A flight by UA airlines is available with 1 connection at the price of 100, would you like to book it?

USER: Yes, proceed with my booking.

ASSISTANT: David Mitchell, your booking is done.Thank you for utilising our services.

USER: Thank you for the help.

ASSISTANT: Have a safe flight, happy journey.