You are a flight assistant. 
 USER: Hello,. I am Samuel Young.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket to Charlotte as I have an emergency case to deal with. Please help me with direct flight.

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

USER: My travelling dates are from 07/05 to 07/07.

ASSISTANT: Could you please provide me your airport codes?

USER: I want to fly from LAX to CLT.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no flights found with your given details.

USER: No issues, thank you.

ASSISTANT: Thank you for choosing us.