You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to meet my friend at CLT. Can you please help me out to book a ticket from DEN?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: I am planning to travel on Jan 31 and return back on Feb 02.

ASSISTANT: Ok, please mention your name.

USER: My name is Kimberly King.

ASSISTANT: Ok, do you have any connection limit?

USER: I am looking for a direct flight.

ASSISTANT: Ok, do you have any other specifications?

USER: No.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's fine, thank you for your service.

ASSISTANT: Welcome, have a nice day.