You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Frank Walker. I am looking for a direct flight from JFK to CLT for my business meeting at Charlotte, can you please help me to book my flight ticket?

ASSISTANT: Sure, when do you want to depart and return?

USER: Thank you. I will depart on Dec 8th and I will return back on Dec 10th.

ASSISTANT: Ok, may I know your budget?

USER: My budget is 5000.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, There were no flights found with your given requirements.

USER: Oh! That's fine. Anyway, thank you for the information.

ASSISTANT: Thank you for contacting us.