You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: In Dallas, I have some important work. Can you please help me in ticket booking from Las Vegas?

ASSISTANT: Sure, I will help you. Can you please mention the dates when you want to travel?

USER: My travel dates are from 05/02 to 05/04.

ASSISTANT: May I know your source and destination airport codes respectively?

USER: Sure, my airport codes are LAS and DFW respectively.

ASSISTANT: On which name do you want want to book the ticket?

USER: Myself Jeffrey Collins.

ASSISTANT: Can you mention any airline preference if you have?

USER: Yes, I would like to travel in normal cost airline.

ASSISTANT: Do you have any other preferences?

USER: I want a single connection.

ASSISTANT: Sorry Jeffrey Collins, there is no flight scheduled till now as per your requirements.

USER: It's ok, thank you.