You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: will you please book me a direct flight to CLT?

ASSISTANT: May I know your source airport code?

USER: I will be leaving from SEA.

ASSISTANT: May I know your travelling dates?

USER: My departure is on May 4th and arrival is on May 6th.

ASSISTANT: Is there any connection limit?

USER: I have already mentioned above that I need a direct flight.

ASSISTANT: Sorry, Is there any other preferences?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Gary Taylor.

ASSISTANT: There were no flights found with your required dates to travel.

USER: That's alright, thanks for your response.

ASSISTANT: Thank you for choosing us.