You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight ticket to IAH to attend for an Innovation festival. Can you please make a reservation on the month of June?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Carol Williams.

ASSISTANT: Can I know your depart and return dates?

USER: I will depart on June 18 and return on June 20.

ASSISTANT: May I know your source point?

USER: I am boarding from PHL.

ASSISTANT: May I know your connection limit?

USER: I need a stopover.

ASSISTANT: May I know your other preferences?

USER: No.

ASSISTANT: Sorry, we could not find any flights on your requested travelling dates.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for choosing us.