You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Can you help me to find a flight to Chicago on Mar 2nd?

ASSISTANT: Sure, may I know your good name?

USER: My name is Elizabeth Thomas.

ASSISTANT: Could you please share your take off airport code?

USER: I will take off from DCA airport.

ASSISTANT: May I know your return date?

USER: I will return on 4th Mar.

ASSISTANT: Do you have any preferences?

USER: I like to travel on connecting flight.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for opting us.