You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephanie Jackson.

ASSISTANT: How can I assist you?

USER: I need a direct flight in my journey, can you help me in booking?

ASSISTANT: Sure Jackson, can you provide the travelling dates please?

USER: I will fly on 04/02 and return on 04/04.

ASSISTANT: Do you have any specifications?

USER: My fare is 200.

ASSISTANT: May I know your airport codes please?

USER: I will start my journey from LGA and end at DCA.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

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

USER: No issue, I will try with other alternative. Thank you for helping.

ASSISTANT: Thank you for choosing us.