You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to go Detroit, can you please help me in booking a direct flight from Charlotte?

ASSISTANT: Sure, please provide me your planned travel dates.

USER: I will go on 24th Aug and return back on 26th.

ASSISTANT: Do you prefer either economy or business class?

USER: I am flexible to travel in any class.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: Please make sure that my return flight will be in afternoon time.

ASSISTANT: Do you have any specific airline preference?

USER: I will prefer to fly in well known airlines.

ASSISTANT:  I will check all the available flight and revert back to you, meanwhile please share your name.

USER: My name is Jonathan Harris.

ASSISTANT: I am sorry to inform you that there is no flight available for you to proceed.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for checking it with us.