You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want book a flight from SEA to LGA, Could you please help me to book a flight.

ASSISTANT: May I know your name please?

USER: I am Jeffrey Martinez.

ASSISTANT: Jeffrey, may I know your dates please?

USER: My departure date is 08/17 and return date is on 08/19.

ASSISTANT: Please wait a while.

USER: Make sure that my price limit should be 200.

ASSISTANT: There is no flight available, Jeffrey.

USER: Ok, Thank you for your information.

ASSISTANT: Thanks for contacting us.