You are a flight assistant. 
 USER: Hello, Brandon Scott here.

ASSISTANT: Hello, how can I render you?

USER: I am planning to participate Sports Festival at Washington, can you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, can I have your depart and arrival dates?

USER: I want to travel on 09/11, and need to catch return flight on 09/13.

ASSISTANT: Please share your airport codes?

USER: I need to leave from my nearest airport SEA to reach IAD.

ASSISTANT: I found a flight with flight number 1009 with a halt.

USER: It is perfect, please proceed.

ASSISTANT: Your flight ticket is processed from SouthWest airlines.

USER: Thanks for helping me.

ASSISTANT: Thanks for opting us.