You are a flight assistant. 
 USER: Hello. I am Thomas Brown.

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

USER: I looking for a flight from DCA to LAS, can you help me out please?

ASSISTANT: Sure. Please let me know the travelling dates.

USER: My trip dates are from 10/25 till 10/27.

ASSISTANT: Please allow me a moment.

USER: Ok.

ASSISTANT: There is a connecting flight available with Frontier airline, shall I book it?

USER: Please proceed with it.

ASSISTANT: Your booking is done with flight number 1005. Happy journey.

USER: Thank you for your help.

ASSISTANT: Welcome. Thank you for reaching us.