You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dennis Harris from Dallas.

ASSISTANT: Nice meeting you Dennis Harris.

USER: Nice to meet you too, you can call me as Harris.

ASSISTANT: Sure Harris, In which way I can assist you at this moment?

USER: I want to go to Las Vegas in this month for my film shooting purpose, can you please help me in booking flight ticket?

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your preferable departure and return dates of travelling?

USER: This is a small schedule in Las Vegas so I want to departure on 07/26 and also confirm my return ticket too on 07/28.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: I would like to take off from DFW airport and destination airport is LAS because these two airports are very convenient for me to travel.

ASSISTANT: Thank you for providing your travel information, please wait a moment to check the flights availability in your route.

USER: Ok, take your time.

ASSISTANT: Yes, I have found a flight with connection 0 with a minimum fare of 100 provided by Spirit airlines. Shall I proceed with this?

USER: But I need 1 halt in between my journey. Can you please check once again?

ASSISTANT: Ok, I search for it. Please be on hold to check the flights availability with your required connections.

USER: Ok, thank you.

ASSISTANT: Sorry to inform you that, there are no flights available with your required connections.

USER: Oh! So sad to hear that, I will choose another airline to reach my destination. Thank you for your service.

ASSISTANT: Thank you for approaching to our services, hope you a have a great day.

USER: Most welcome.