You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Rebecca Taylor, I want to book a direct flight to Denver. Can you help me in booking a ticket with in the price of 5000?

ASSISTANT: Sure, please provide your travelling dates.

USER: My travelling dates are from 03/22 to 03/24.

ASSISTANT: May I know your good name?

USER: I am already mentioned above.

ASSISTANT: Can I Know your journey codes?

USER: My airport codes are from DFW to DEN.

ASSISTANT: Unfortunately there is no flight found with your requirement.

USER: Ok, No problem. Thank you.

ASSISTANT: Thank you for reaching us.