You are a flight assistant. 
 USER: Hi. I am Sharon Lopez.

ASSISTANT: Hello, how can I serve you?

USER: I have an opointment with my doctor on 01/25.

ASSISTANT: Ok.

USER: Can you please book a ticket to reach Charlotte, CLT?

ASSISTANT: Sure. Let me know your origin?

USER: Boston, BOS is my boarding point.

ASSISTANT: When are you come back?

USER: My return will be on 01/27.

ASSISTANT: Do you have any requirements?

USER: Price should not exceed 500. I need a connecting flight.

ASSISTANT: Thanks for your details, There are no flights available with your data.

USER: Ok, thank you for the information.

ASSISTANT: Thanks for choosing us.