You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Mary Wright, planning to visit Washington. Can you please book me a ticket with direct flight?

ASSISTANT: Sure, could you please mention your dates of journey?

USER: My planned dates of journey are from 12/06 to 12/08.

ASSISTANT: Ok, may I know your respective airports codes of journey please?

USER: My nearest airport codes of travelling are from DEN to IAD.

ASSISTANT: There is a flight which is direct for you travel and the fare of this flight is 100, are you ok with this ticket?

USER: Please reserve my ticket with this flight.

ASSISTANT: Your booking is done with the Southwest airline and flight number is 1028.

USER: Thank you for booking my ticket.

ASSISTANT: You are welcome and have a safe flight.