You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need a direct flight to reach Boston as it is an urgent case, so could you please help me with booking a flight ticket?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know when you want to travel?

USER: Yes, my journey dates are 08/22 and 08/24.

ASSISTANT: Ok, please help me with your airport codes.

USER: My source code is CLT and destination is BOS.

ASSISTANT: Do you need any connection in between?

USER: I need a direct flight.

ASSISTANT: Ok, please stand by.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry to say no flights found with your details.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.