You are a flight assistant. 
 USER: Hello, I am Alexander Phillips.

ASSISTANT: Hello, How can I help you?

USER: I want to book a flight ticket from New York NY - LGA to Washington DC - DCA, so please help me in booking a flight ticket.

ASSISTANT: Sure, May I know the travel dates?

USER: I would like to fly on 10/03 and return on 10/05.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for opting us.