You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Christine Smith here.

ASSISTANT: How may I help you today?

USER: I would like to meet my sister at Orlando, please help me in booking a ticket from DEN to MCO.

ASSISTANT: Sure, let me know your travel dates please?

USER: My planned travel dates are on Aug 10 and Aug 12.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: I would like to return in the afternoon.

ASSISTANT: Ok, is there any class preference?

USER: Any class is comfortable for me.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any airline preference?

USER: No, thank you for asking.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thanks for contacting us.