You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a flight ticket to meet my friend in the month of August for attending a small event in Washington city. Can you please assist me in booking my flight ticket from San Francisco?

ASSISTANT: Sure, I am glad to help you out. Please provide me your location airport codes.

USER: Thank you for accepting my request. My location airport codes are SFO and DCA respectively.

ASSISTANT: Please mention me your travel dates.

USER: OK, I have planned to make a move on 08/22 and want to catch a return flight on 08/24.

ASSISTANT: May I know your name to proceed further?

USER: Yes, I am Brandon Carter.

ASSISTANT: Sorry Carter, no flight with your requirement.

USER: Not a problem, I will go with another agency to book my flight ticket to reach out my destination point. Anyways thank you for the information.

ASSISTANT: Thank you for reaching us.