You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, this is one of the best agency providing booking service, solves all the queries of customer instantly, how may I help you?

USER: I am fascinated by the rich history of Dallas and I am planning to visit one of the historical places.

ASSISTANT: May I know your location codes?

USER: Can you book a flight ticket from Washington DC - IAD to Dallas, TX - DFW?

ASSISTANT: Can you please tell me your journey dates?

USER: My journey dates are 06/10 and return to IAD is on 06/12.

ASSISTANT: May I know your name?

USER: Myself David Jackson.

ASSISTANT: There is a flight available with Hawaiian airlines, are you comfortable to fly in this flight?

USER: Yes, I am comfortable with this flight book it for me.

ASSISTANT:  Your reservation process completed.

USER: Thank you for the booking.

ASSISTANT: You are welcome, have a safe journey. The flight number is 1000 and airline is Hawaiian.

USER: Most welcome.