You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Gary Nelson. I need to book a ticket with fare of 200 to meet my manager in office. Could you please help me in doing that?

ASSISTANT: Sure, can I know your preferable dates?

USER: My travelling dates are 03/02 and return on 03/04.

ASSISTANT: Ok, let me know your source and destination airport codes?

USER: My travelling airport codes are MCO and LAX.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.