You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gary Hernandez here.

ASSISTANT: How may I help full to you at this moment?

USER: I want to attend a Marriage in Washington. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, our service agency can help you in booking. On what dates that you are willing to book the ticket?

USER: My travelling dates are from 01/26 to 01/28.

ASSISTANT: May I know your source and destination region airport codes?

USER: My airport codes are from IAD to IAD.

ASSISTANT: Please give me a moment.

USER: Ok, I will wait.

ASSISTANT:  As per your details, one of the flight 1015 which is providing by Delta airlines with a fare of 100 and there is a 1 halt, can I confirm your flight ticket booking?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Gary, your flight ticket booking is done on your route to reach your location.

USER: Thanks for helping me.

ASSISTANT: You are most welcome and have a great journey.