You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My travel dates are Sept 18 to 20.

ASSISTANT: Do you have any connection limit?

USER: I prefer connecting flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: No.

ASSISTANT: On what name, do I need to reserve your ticket?

USER: I am Thomas Perez.

ASSISTANT: Spirit Airline is available with the price of 100 having direct flight and economy class. Can I proceed to booking?

USER: Please proceed.

ASSISTANT: Your ticket has been reserved with the flight- 1013.

USER: Thank you.

ASSISTANT: Thank you for reaching us.