You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Can you please help me to book a ticket from DEN to LAS?

ASSISTANT: Sure, I am mirthful to help you. Kindly, share your journey dates please.

USER: My travelling dates will be on Jan 25 to Jan 27.

ASSISTANT: Ok, help me with your connection limit.

USER: I need a connecting flight.

ASSISTANT: In which class, you are willing to travel?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Can I have your name please?

USER: Christopher Johnson here.

ASSISTANT: Thanks for your details, please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, no flights were found based on your schedule.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.