You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I am looking for a direct flight from CLT to ORD, can you please help me to book a flight ticket?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, my journey dates are Dec 30 and Jan 01.

ASSISTANT: Ok, could I have your name please?

USER: My name is Carol Brown.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a direct flight.

ASSISTANT: Ok, may I know your airline preference?

USER: I am ok with any airline to travel.

ASSISTANT: Ok, please allow me a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: No problem, thank you for your information.

ASSISTANT: You are welcome.