You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am planning to visit the Korean war veterans memorial which is located in Washington, DCA. Can you avail me to book a flight ticket?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: My travel dates are Jan 14 and 16.

ASSISTANT: Could you please mention your source airport code name?

USER: My source airport code name is Denver, DEN.

ASSISTANT: May I know your name for further process?

USER: Katherine Clark here.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any another specifications?

USER: No.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: UA flight available with connection limit 1 and fare is 100, shall I confirm this economy class flight?

USER: Please proceed.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1009.

USER: Thanks for the help.

ASSISTANT: You are welcome Katherine Clark.