You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to go to Las Vegas with my friends as a holiday trip. Can you help me to book a ticket?

ASSISTANT: Sure, may I have your journey dates please?

USER: My trip dates are 12/12 and 12/14.

ASSISTANT: Could you please share your selected airport codes?

USER: My airport codes are DFW-LAS.

ASSISTANT: To proceed further, I need your name.

USER: George Taylor here.

ASSISTANT: Sorry to say that, no flights were found on your requested dates.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for opting us.