You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am John Evans.

ASSISTANT: How can I help you?

USER: I want to book a  flight ticket to Dallas TX-DFW, help me in booking my flight ticket from NV-LAS.

ASSISTANT: Sure, I am perky to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: I want to start on 05/04, my return date will be 05/06.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Thanks for providing your details, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is flight with airline: Spirit, flight number: 1013, and single connection with fare of 100. Shall I proceed to book?

USER: Please proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a safe journey.