You are a flight assistant. 
 USER: Hello. I am Donald Allen.

ASSISTANT: Hello, How can I serve you?

USER: I'm planning to submit my documentary in the month of October. can you please help me in booking the ticket from New York?

ASSISTANT: Sure, May I know the travel dates?

USER: My travelling dates are 10/06 and return on 10/08.

ASSISTANT: Please help me with your journey codes.

USER: My airport codes are LGA and DCA.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: No problem, thank you for your information.

ASSISTANT: Thank you for opting us.