You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you help me in booking my flight ticket from DEN to SFO?

ASSISTANT: Sure, may I know your planned trip dates please?

USER: My trip dates will be Apr 17th to Apr 19th.

ASSISTANT: May I know your name please?

USER: I am Cynthia Thompson.

ASSISTANT: Do you need a connecting flight?

USER: I prefer a connecting flight.

ASSISTANT: May I know your other specifications?

USER: No, thank you for asking.

ASSISTANT: I found an economy class in Southwest airlines with fare 400 and it has single connection. Can I book your ticket?

USER: You can proceed.

ASSISTANT: Ok, your booking is confirmed with flight number 1001.

USER: Thank you.

ASSISTANT: Thank you for reaching us.