You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you?

USER: Help me in booking a flight from JFK to IAH?

ASSISTANT: Sure, please provide your trip dates.

USER: My travelling dates are Sept 27 to 29.

ASSISTANT: Which class do you prefer?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I prefer direct flight.

ASSISTANT: May I know your name?

USER: I am Nancy Mitchell.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Please hold on for a while.

USER: Ok.

ASSISTANT: Sorry Nancy Mitchell, no direct flight is available on your planned dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.