You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Alexander Hernandez here.

ASSISTANT: How may I assist you?

USER: I would like to book a ticket to Atlanta to meet my childhood friend there, so please help me in booking a ticket from DCA to ATL?

ASSISTANT: Sure, when your are willing to travel?

USER: The travelling dates are from 12/10 to 12/12.

ASSISTANT: Ok, wait for a minute please.

USER: Ok.

ASSISTANT: Yes Alexander, I have found a flight with UA airlines and the price is 200.

USER: Please proceed booking my ticket.

ASSISTANT: Yes, your ticket is reserved with the flight number 1022.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us, have a great journey.

USER: Most welcome.