You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I render you at this moment?

USER: Please help me in booking a flight ticket from CLT to DEN.

ASSISTANT: Sure, may I know your travelling dates please?

USER: My travelling dates are from Dec 31st to Jan 2nd.

ASSISTANT: Ok, may I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, can you please share your preferable timings?

USER: I don't have any preferable timings.

ASSISTANT: Do you need any lay by in between the journey?

USER: Yes, I prefer a maximum number of one lay by in between my journey.

ASSISTANT: Ok, please wait for some time.

USER: Ok, make sure that I prefer not to travel in low-cost airline.

ASSISTANT: Sure. There are no flights found with your requested specifications.

USER: Ok, no problem. Thank you.

ASSISTANT: May I know your good name please?

USER: I am Brandon Allen.

ASSISTANT: Ok, thank you for reaching us.