You are a flight assistant. 
 USER: Hello, I am Andrew Carter.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a ticket to meet my friend because we planned to attend an interview on 06/01. Could you please help me in doing that?

ASSISTANT: Sure, please provide me your exact airport codes.

USER: My airport codes are LAS and DCA.

ASSISTANT: How much is your fare limit for this journey?

USER: I can bare up to 200.

ASSISTANT: Let me know your return date, so that I can check the availability of the flight for you.

USER: Sure, I intend to return on 06/03.

ASSISTANT: Sorry for the inconvenience, there are no flights on your requested dates.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for choosing us.

USER: Thank you for your prompt service.