You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: Can you assist me with flight ticket booking to DFW to attend a seminar, so can you please help me with booking from LAX location?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: Thank you and my travel dates are Dec 14 and I will arrive back on Dec 16.

ASSISTANT: May I know your name to book the flight ticket?

USER: Sure, my name is Susan Mitchell.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a single stop flight.

ASSISTANT: Any more specifications do you have?

USER: No.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure, take your time.

ASSISTANT: We regret to inform you that, there are no flights available for your journey with your requested dates of travelling.

USER: Very sad to hear that one from your end, I can prefer any other source. Thank you for your help.

ASSISTANT: Thank you for approaching us, have a great day.