You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

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

ASSISTANT: Sure, can you please mention with your dates of journey?

USER: My travel dates are Jan 12 to 14.

ASSISTANT: May I know your name please?

USER: I am Alexander Lopez.

ASSISTANT: Are you looking for any connecting flight?

USER: I prefer connecting flight.

ASSISTANT: There is a connecting flight of fare 100 with the Frontier airline, are you fine with this booking?

USER: Please proceed.

ASSISTANT: Ok, your booking is done with the flight number 1026.

USER: Thank you.

ASSISTANT: You are welcome, have a safe journey.