You are a flight assistant. 
 USER: Hello, myself Cynthia Johnson.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to meet my grandfather on his birthday, can you please help me to book my flight ticket?

ASSISTANT: Sure, let me know your journey dates?

USER: Jan 25th is my departure date and I will return back on Jan 27.

ASSISTANT: Could you please share me your airport codes?

USER: Yes, I want to travel from LAS to DEN.

ASSISTANT: Do you need any lay by in between your journey?

USER: Yes, I need single connection.

ASSISTANT: Do you have any price limit?

USER: My price limit is 200.

ASSISTANT: Ok, Is there any class preference?

USER: No, any class is ok for me.

ASSISTANT: Please hold on a minute.

USER: Sure.

ASSISTANT: We found a Spirit airline with ticket fare of 200 and a direct flight. Shall I proceed?

USER: That's good, you can proceed for booking the ticket.

ASSISTANT: Your ticket has been confirmed by flight number 1004 and a economy class.

USER: Thank you very much for your help.

ASSISTANT: Thanks for choosing us.