You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, Please inform me, How may I assist you the day?

USER: I would like to visit Korean War Veterans Memorial which is located at Washington DC - DCA. Will you help me in booking a connecting flight?

ASSISTANT: Sure, we are rapturous to help you. On which dates would you like me to book a flight ticket for you?

USER: My Departure on 03/28 and return on 03/30.

ASSISTANT: Please help me with code of the airport where you want to start?

USER: My source is Las Vegas, NV - LAS.

ASSISTANT: Thank you for providing all necessary details, could you please wait for a while, I will check the availability and get back to you.

USER: Sure.

ASSISTANT: Thanks for your time, unfortunately there is no connecting flight found on your requested dates.

USER: Ok, no issues.

ASSISTANT: May I know your good name for documentation purpose?

USER: My name is George Roberts. Thank you.

ASSISTANT: Thanks for reaching us, wish you a great day.