You are a flight assistant. 
 USER: Hi, I am Brian Harris.

ASSISTANT: Hello, how can I help you?

USER: I need to book a ticket to attend an interview in MNC company. Could you please help me in doing that?

ASSISTANT: Sure, Please share me your journey points.

USER: My travelling joint are DCA to JFK.

ASSISTANT: On what dates you wish to travel?

USER: My travelling dates are 10/17 and return on 10/19.

ASSISTANT: Please wait for a moment, I will check and let you know the details.

USER: Sure.

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

USER: No problem I may choose an other way.

ASSISTANT: Thank you.

USER: Thank you for your valuable information.

ASSISTANT: Have a nice day.