You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I want to attend a Seminar in Los Angeles. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates to book a flight ticket?

USER: My travelling dates are Aug 30 and Sep 01.

ASSISTANT: May I know your source point and destination point?

USER: My airport codes are SEA and LAX.

ASSISTANT: Let me know your name?

USER: My name is Charles Walker.

ASSISTANT: Do you have any other specifications?

USER: I prefer single connecting flight.

ASSISTANT: Ok, wait for some time.

USER: Ok, I will wait.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Anyway, thanks for the information.

ASSISTANT: Thanks for contacting us.