You are a flight assistant. 
 USER: Hello, I am Cynthia Rodriguez.

ASSISTANT: Hello. How can I help you?

USER: Can you please assist me in booking a flight ticket from Houston, HOU to reach New York, LGA?

ASSISTANT: Sure, may I know when are you willing to travel?

USER: My journey dates are from July 31 to Aug 02.

ASSISTANT: Do you prefer either business or economy class?

USER: I prefer to travel in economy class.

ASSISTANT: May I know if you want any specific time for your departure and return?

USER: My departure time is afternoon.

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: We don't have any flight available at this moment for your journey.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you.