You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I assist you today?

USER: I am Patricia Collins.

ASSISTANT: Ok.

USER: I want to attend Live Music Concert in Las Vegas, NV - LAS. Can you help me in booking a flight ticket?

ASSISTANT: Sure. Do you prefer any halt in between your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My travelling dates are 01/03 - 01/05.

ASSISTANT: When will you catch your return flight? I need your selected airport code, that you wish to board from?

USER: My origin airport is from Washington, DC - DCA.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing us.