You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need to attend kite festival at Seattle, can you book a ticket from OAK to SEA?

ASSISTANT: Sure, I am happy to help you. Can I have your trip dates?

USER: Sure, my planned departure and return travel dates are 30th April and 2nd May.

ASSISTANT: Do you have any connection limit?

USER: I prefer single connected flight.

ASSISTANT: Would you please let me know your class preference?

USER: I'm ok with any class.

ASSISTANT: May I know your good name?

USER: My name is Jeffrey Lewis.

ASSISTANT: Is there any other specifications for you?

USER: No, I don't have any other specifications.

ASSISTANT: Thanks for providing details, no flights are available on your preferable journey dates.

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

ASSISTANT: Thank you for contacting us.