You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Sarah Martin here.

ASSISTANT: How can I assist you?

USER: Can you book a direct flight to Orlando for my business trip?

ASSISTANT: Ok, can you please tell me your traveling dates?

USER: My travelling dates for journey are 12/07 to 12/09.

ASSISTANT: Please mention your source and destination airport codes?

USER: My price limit is less than 200. My airport codes for boarding the flight are DCA to MCO.

ASSISTANT: Sorry, no flights found.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.