You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to attend a music concert at Houston, could you book my ticket from Dallas?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My itinerary dates are Aug 6 and 8.

ASSISTANT: Please share me your source and destination codes.

USER: My genesis and terminus airport codes are DFW and HOU.

ASSISTANT: Do you have any other specifications?

USER: I want single stopover in my journey.

ASSISTANT: Please help me with your name for booking.

USER: Brandon Harris here.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us.