You are a flight assistant. 
 USER: Hello. I am Paul Thomas.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I would like to book a ticket from ORD to IAH, can you please help me out?

ASSISTANT: Sure, when you are planning to make your journey?

USER: I am travelling on these dates Oct 15th and 17th.

ASSISTANT: Do you prefer any class in your journey?

USER: I don't have any class preference.

ASSISTANT: May I know your depart and return timings?

USER: I prefer departure time in the afternoon.

ASSISTANT: Please mention your connection limit.

USER: I need a single connected flight.

ASSISTANT: Sorry, there are no flights are available matching your details.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing us.