You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to book a ticket from IAH to ATL, can you help me?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travel dates are June 13 and 15.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Book the ticket in the name of Helen Robinson.

ASSISTANT: Do you have any connection limit?

USER: I prefer a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.