You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Stephan Hernandez. I want to book a ticket from HOU to OAK to attend seminar, can you help me in booking?

ASSISTANT: Sure, I am here to aid you in booking your flight ticket. May I know your travel dates?

USER: I am departing on May 09 and return on May 11.

ASSISTANT: Ok, please tell us your preferences.

USER: I need a flight with connection limit 1.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that there is no flight available on your preferred travel dates.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome and thank you for reaching us.