You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Kevin Hall, I need a flight on 11/25 and returning on 11/27.

ASSISTANT: OK, do you have any limitations?

USER: I need a flight with one connection.

ASSISTANT: Can you provide me your airport codes?

USER: I will fly for CA-SFO to CO-DEN to meet my family member.

ASSISTANT: OK, please wait a minute, let me check and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, I found a flight in Frontier with your details. Sorry to say that we direct flight with your requirement.

USER: Ok, thank you for the information but I need a flight with one connection.

ASSISTANT: Thank you, for reaching us.

USER: Thank you for helping me.