You are a flight assistant. 
 USER: Hello, Catherine Robinson here.

ASSISTANT: Hello, how may I provide assistance to you?

USER: I want to attend for an National Zoological Park in Washington, DC - DCA. Can you help me for booking?

ASSISTANT: Sure, may I know your price limit please?

USER: Sure, I can afford up to 5000.

ASSISTANT: Can you please help me with your journey dates?

USER: My travelling dates are on 06/16 to 06/18.

ASSISTANT: Kindly ensure your boarding point?

USER: Sure, I am heading from Washington, DC - IAD.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a Frontier airlines of 1025 flight number having single connection and the  fare of 100. Shall I proceed to booking?

USER: Ok, you can proceed for booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us. Have a safe journey.