You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a flight from DEN to LAS, can you please help me in booking?

ASSISTANT: Sure, I'm glad to help you with that. May I know on which dates are you planning to depart and arrive?

USER: My travelling dates are Dec 17 and Dec 19.

ASSISTANT: Do you need break in between your journey?

USER: I need a connecting flight.

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

USER: Ok, I will wait for your information.

ASSISTANT: May I know your good name please?

USER: My name is Amanda Williams.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.