You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you please help me to book a flight to travel on Dec 17th?

ASSISTANT: Sure, I am here to help you. Can you please share your airport codes?

USER: I will be boarding from IAD to reach MCO.

ASSISTANT: May I know your arrival date?

USER: My return date is Dec 19th.

ASSISTANT: Do you have any connection limit?

USER: I am fine with one connecting flight.

ASSISTANT: May I know your class preference?

USER: I am comfortable in any class.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Ashley Lopez.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.