You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anna Gonzalez here.

ASSISTANT: Do you need any assistance from us?

USER: I need to reach Denver to give gust lecture so please help me with flight ticket booking from CLT to DEN?

ASSISTANT: Sure. If you have any planned travelling dates, could you please tell us?

USER: Sure, I have planned my travel dates as 02/18 and 02/20.

ASSISTANT: The Spirit airline with flight number 1007 is available having price as 300 and connection as 1. Shall I proceed booking?

USER: That's great, please proceed with booking.

ASSISTANT: Ok, your reservation is done.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.