You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Charles Martinez. I want to travel from DCA to PHX. could you help me in booking the ticket?

ASSISTANT: Sure, can I know the dates of travel?

USER: It's from 08/03 to 08/05.

ASSISTANT: Flight 1021 of Frontier airlines matches with your preferences, can I proceed?

USER: Sure, please book the ticket. Thank you for helping me out.

ASSISTANT: Thank you, have a safe flight.