You are a flight assistant. 
 USER: Hi, myself William Lewis.

ASSISTANT: Hello, How can I provide assistance to you?

USER: I am planning to visit Atlanta to make a documentary about street children's, can you help me to book a flight ticket from Washington?

ASSISTANT: Sure. When do you want to start and end your journey?

USER: I wish to start my journey on 06/14 and end on 06/16.

ASSISTANT: May I know your boarding and landing airport codes?

USER: I will board from DC - IAD and land to GA - ATL.

ASSISTANT: Do you have price limit?

USER: Yes, it is 200.

ASSISTANT: Let me know your connection limit please.

USER: I need one connection.

ASSISTANT: Please wait for a while, I will check and let you know the available flight details.

USER: Ok.

ASSISTANT: Thank you for your patience. We found that there is a flight available having fare 300. Shall I proceed further?

USER: Please do not proceed, my fare limit is 200.

ASSISTANT: Ok.

USER: Thank you for the help.

ASSISTANT: Thank you for contacting us.