You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jason Collins.

ASSISTANT: How may I help you?

USER: I want to book a ticket from IAH to OAK to attend seminar, can you help me in booking?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please provide me your travel dates?

USER: I am departing on May 30 and return on June 01.

ASSISTANT: Ok, do you have any preference about the connection limit?

USER: I need a flight with connection limit 0.

ASSISTANT: Ok, please give me a minute. In the meanwhile, tell me if you have any other specifications?

USER: I want to depart in Afternoon time.

ASSISTANT: Sorry to inform you that, there are no flights found which is departing in the afternoon time.

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

ASSISTANT: You are welcome. Thank you for opting us.