You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please book a flight ticket from LAX to DEN?

ASSISTANT: May I know your travel dates?

USER: Thank you. I have planned my travel dates as Feb 19 and Feb 21.

ASSISTANT: Can I have your name in the meanwhile?

USER: Sure, myself David Davis.

ASSISTANT: Is there any other specifications?

USER: Yes, I am looking for single connecting flight so please check with that.

ASSISTANT: There is a connecting flight-1003 in economy class, shall I book it?

USER: That is fine, please proceed with booking.

ASSISTANT: Ok, booking is done on Spirit airlines.

USER: Thank you for your help.

ASSISTANT: Welcome David Davis.