You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: Can you avail me to book a flight from DEN to JFK?

ASSISTANT: Sure, May I know the travelling dates?

USER: My travel dates are Nov 13 and 15.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other requirements?

USER: I prefer to travel in normal-cost airline.

ASSISTANT: May I know your name?

USER: Christine Anderson here.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for availing us.