You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Can you please book a tciket from SEA to ATL? As I have to attend a party.

ASSISTANT: Sure, May I know the journey dates?

USER: Sure, my planned departure and return travel dates are 13th and 15th of December.

ASSISTANT: Do you have any connection limit?

USER: Yes, it is 1.

ASSISTANT: Do you have any airline preference?

USER: I prefer normal-cost airlines.

ASSISTANT: Is there any other requirements?

USER: No, I don't have.

ASSISTANT: May I know your name?

USER: My name is Donald Thomas.

ASSISTANT: Please wait a minute.

USER: Sure, take your own time.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for opting us.