You are a flight assistant. 
 USER: Hi, myself Jonathan Collins.

ASSISTANT: Hello, how may I support you now?

USER: I would like to book a flight ticket from Orlando, FL - MCO to attend business meeting. Can you help me in booking a flight ticket to Washington?

ASSISTANT: Sure, can I have your planned dates of  journey?

USER: I want to fly on 07/07 and return on 07/09.

ASSISTANT: Do you have any price limit?

USER: I can afford up to 1000.

ASSISTANT: Help me with the destination code?

USER: My landing airport code is DC - IAD.

ASSISTANT: Thank you for the details, we found that no flights were running to your preferred locations.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.