You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Can you aid me to book flight ticket from CLT to BOS?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: When are you planning to start and return?

USER: I would like to travel on Feb 20 and Feb 22.

ASSISTANT: Ok, please specify your name.

USER: Michelle Harris here.

ASSISTANT: Is there any class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other essentials to meet?

USER: I need a direct flight to travel.

ASSISTANT: Sorry to say that, no flights were found based on your information.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for choosing us.