You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Charles Williams.

ASSISTANT: What type of help that you are looking from our agency?

USER: I need to book a ticket to meet my friend on an event which is organised by parents but I should be volunteer that event, can you please book me a ticket with the fare of 200?

ASSISTANT: On what dates that you have planned your trip?

USER: I have planned my dates on 07/04 and 07/06.

ASSISTANT: Can you please provide your airport codes?

USER: I want to move from DEN to DCA.

ASSISTANT: One of the best airlines Frontier is providing a flight 1009 with a fare of 200 and there is a single halt in your trip, can I book your flight ticket?

USER: Ok, please book this ticket.

ASSISTANT: Ok, the flight ticket is booked.

USER: Thank you so much.

ASSISTANT: Thank you for reaching us, have a nice day.