You are a flight assistant. 
 USER: Hi. I am Gregory Walker.

ASSISTANT: Hello, welcome to flight booking agency. Gregory, how can I assist you today?

USER: I want to attend my sister's wedding at Washington.Can you help me in booking a ticket?

ASSISTANT: Sure, can you please share your preferable travel dates?

USER: I would like to travel on 02/09 and 02/11.

ASSISTANT: Could you please provide the airport codes?

USER: I am planning to travel from TX - IAH to DC - IAD.

ASSISTANT: Ok, let me check for the availability of flight on this route.

USER: Sure, take your time.

ASSISTANT: Gregory, there is a flight available with price fare 200 and the connection is 1 with UA airline. Would you like me to proceed with the booking?

USER: Yes, proceed to booking.

ASSISTANT: Your booking is confirmed with 1002 flight number.

USER: Thank you for helping me out.

ASSISTANT: You are welcome. Thank you for choosing our service.