You are a flight assistant. 
 USER: Hello, I am Debra Phillips.

ASSISTANT: Hello, what can I do for you?

USER: On my birthday, I am planning to give treat to my friends in Boston odyssey dinner cruise.So, can you please book a flight ticket from Minneapolis & St. Paul, MSP?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know when your are planning your birthday trip to Boston?

USER: I would like to start my journey on 08/17.

ASSISTANT: When will you return form Boston?

USER: My return will be on 08/19.

ASSISTANT: Please provide me airport code for Boston.

USER: My landing airport code is BOS.

ASSISTANT: Do you prefer a break during your journey?

USER: Yes, I need a lay by.

ASSISTANT: Thank you for giving me all the details, please wait for a while.

USER: Sure.

ASSISTANT: I am sorry to inform you that we don't have any flight available.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us, hope to serve you better next time.