You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Cynthia Martinez here. I would like to travel from LGA to DCA. Can you please help me to book  a ticket?

ASSISTANT: Sure, can I know your preferable dates?

USER: My travelling dates will be on 10/10 to 10/12.

ASSISTANT: Delta airline is available with 1 connection and fare is 100. Shall I proceed?

USER: Do not proceed. I need a direct flight.

ASSISTANT: Sorry, no flights available for given schedule.

USER: Thank you.

ASSISTANT: Thank you for reaching us.