You are a flight assistant. 
 USER: Hello,. I am Charles Phillips.

ASSISTANT: Hello, how can I help you today?

USER: I need to book my flight ticket to Charlotte, CLT to visit NASCAR hall of frame. Can you help me in booking me a direct flight?

ASSISTANT: Sure, may I know your source airport code?

USER: New York, LGA is my source airport.

ASSISTANT: Could you please share your dates of journey?

USER: 07/14 - 07/16 are my willing dates of travel.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for your time. There are no flights found according to your specifications.

USER: Ok, I will choose other airline. Thank you for prompt service.

ASSISTANT: Thank you for picking us.