You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a ticket from IAD to MCO. Could you book a ticket?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Travelling dates are from Oct, 27 to Oct, 29.

ASSISTANT: Are you fine with connecting flight?

USER: I prefer connecting flight.

ASSISTANT: Can I know your name?

USER: My name is Helen Hernandez.

ASSISTANT: Do you have any other requirements to be met?

USER: I would like to return in the evening.

ASSISTANT: Sorry, there is no flight as per your requests.

USER: Thank you.

ASSISTANT: Thank you for reaching us.