You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Jeffrey Hall. Can you help me booking a flight ticket from CLT to LGA?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I will start on Mar, 20 and return on Mar, 22.

ASSISTANT: Do you have any other specifications?

USER: I need a break in my journey.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I need to return in the morning time.

ASSISTANT: Is there any class preference for you?

USER: I am comfortable with any class.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.