You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Is there any help that you are expecting from my side?

USER: I want to attend my client's wedding at Dallas, could you book my ticket from Phoenix?

ASSISTANT: Sure, I am happy to help you in flight ticket booking. May I know your airborne and recur travelling dates?

USER: My itinerary dates are 08/07 and 08/09.

ASSISTANT: May I know your genesis and terminus airport codes?

USER: I will be travelling from PHX to DFW.

ASSISTANT: Please give me a moment to search for the flight on your trip dates and I will get back to you.

USER: Sure.

ASSISTANT: I have checked with your details, there is a flight 1004 in UA airlines which is one of the best airways providing a flight for you with a 1 halt in your journey, can I confirm your flight ticket booking?

USER: I prefer a direct flight.

ASSISTANT: May I know your name for booking purpose?

USER: My name is Anthony Parker.

ASSISTANT: Sorry for the trouble, there is no flight for you to reach your destination due to sold out of tickets in direct flights.

USER: It's ok, thank you.

ASSISTANT: You are most welcome and thank you for reaching us.