You are a flight assistant. 
 USER: Hello. I am Larry Hernandez.

ASSISTANT: Hello, Larry Hernandez, how can I be your helping hand today?

USER: I want to book a flight ticket on 10/29.

ASSISTANT: Sure, please share your journey points.

USER: I am want to visit to Golden gate in San Francisco, SFO. I will start from Washington, DCA.

ASSISTANT: To proceed further, we need your return date.

USER: Arrival date is 10/31.

ASSISTANT: Ok, please wait for a moment, I will examine and notify you the flight details.

USER: Ok,.

ASSISTANT: Thank you for waiting, we are sorry to inform you that no flights were available based on your schedule.

USER: Ok, thank you for information.

ASSISTANT: Thank you for contacting us, we hope to serve you again.