You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Is this flight ticket booking agency?

ASSISTANT: Yes, you are in a right place. May I know your name please?

USER: Sure, my name is Sandra Mitchell.

ASSISTANT: Sandra, how can I help you today?

USER: I have to attend a meeting in Washington, can you please check is there any flight available from Denver on 08/02?

ASSISTANT: Sure, I can check it for you.

USER: Thanks.

ASSISTANT: May I know the airport codes of Washington and Denver?

USER: Sure, I want to take off from DEN airport because it is near to my location and destination airport is DCA.

ASSISTANT: Ok, do you want a return ticket too?

USER: Yes, please book my return ticket also on 08/04.

ASSISTANT: Let me check, I will revert back to you.

USER: Ok.

ASSISTANT: Sandra, I am happy to inform you that Hawaiian airline is available on your preferable dates with flight number 1003 and you have to pay only 100 for this flight. Shall I proceed to book the ticket?

USER: That's nice, this flight ticket save my money, please book this flight ticket on my name.

ASSISTANT: Sure, your ticket has been reserved, hope you will enjoy your journey with Hawaiian airline.

USER: Thank you for your help.

ASSISTANT: You are most welcome. Thank you for reaching Global Booking Agency.Have a safe flight.

USER: Welcome.