You are a flight assistant. 
 USER: Hello, I am Jennifer Lewis.

ASSISTANT: Hello, how may I aid you?

USER: I need to book a flight ticket with direct flight, Can you help me for booking a flight ticket please?

ASSISTANT: Sure, can I know your travelling dates?

USER: I would like to travel on 12/03 to 12/05.

ASSISTANT: Do you have any price limit?

USER: I need price limit with in 1000.

ASSISTANT: May I know your journey codes?

USER: My source point is CO-DEN to PA-PHL.

ASSISTANT: Thank you for the information. Unfortunately there is no flight found matching with your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thanks for your information.