You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to travel from JFK to DEN to attend a sports festival. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, can you please provide your journey dates?

USER: My planned journey dates are Nov 4 and Nov 6.

ASSISTANT: Do you have any specifications to be met?

USER: My return time should be morning and I need an economy class ticket.

ASSISTANT: Can I have your name?

USER: I am Catherine Davis.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.