You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service?

USER: I am Anthony Edwards. I want to book a ticket from DCA to LAS. Could you help me?

ASSISTANT: Sure, let me know when are you willing to travel.

USER: My preferable dates are from 01/03 to 01/05.

ASSISTANT: Do you need a lay by?

USER: Yes, I need 1 connection flight.

ASSISTANT: Thanks for sharing your essentials. There are no flights available at this moment.

USER: That's ok, no problem. Thank you for helping me.

ASSISTANT: Thank you for reaching us.