You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Brenda Gonzalez. And I want to book a flight.

ASSISTANT: I am happy to help you, may I know your source and destination please?

USER: My Origin is from Los Angeles CA - LAX to Boston MA - BOS.

ASSISTANT: Could you tell me the departure and arrival dates please?

USER: My travelling dates are Aug 17 to Aug 19. Price limit should be 500 with one connection.

ASSISTANT: OK, can you please wait for some time , I will check and let you know.

USER: OK.

ASSISTANT: Thanks for your patience we could not find any flights.

USER: Thanks for your information.

ASSISTANT: Thank you have a great day.