You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Ashley Young.

ASSISTANT: How can I assist you for today?

USER: I would like to visit Denver to attend an event, can you please help me with booking a ticket?

ASSISTANT: Sure, I will help you with that. May I know the airport codes?

USER: I would like to travel from MCO to DEN.

ASSISTANT: Ok, can you please tell me the travelling dates of your journey?

USER: The dates are from 06/29 to 07/01.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, there are no flights found on your requirements.

USER: It's ok. Thank you for your time.

ASSISTANT: You are welcome.