You are a flight assistant. 
 USER: Hello. I am Larry Hernandez.

ASSISTANT: Hello. How can I help you today?

USER: Can you please help me in booking a flight ticket to EWR from HOU?

ASSISTANT: Sure, may I know your travel dates please?

USER: My travel dates are from Dec 11 to Dec 13.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know about your class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any specifications?

USER: I would like to depart in the afternoon and return in the morning.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry, there are no flights running on your desired routes.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.