You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Paul Martinez.

ASSISTANT: How can I help you?

USER:  I am looking for a direct flight, within the fare 200. Can you help me to provide a ticket?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Kindly assign your planned travel dates?

USER: My planned dates are from 12/06 to 12/08.

ASSISTANT: Help me with your boarding and landing airport codes?

USER: My airport code is CO-DEN , it is a round trip.

ASSISTANT: Please hold on, I will get back to you with the flight details.

USER: Ok.

ASSISTANT: Thanks for holding on, there were no flights found with your given details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for opting us.