You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Justin Turner. I have a plan to attend burial service of my grand mother in New York with my parents.So I would like to fly from Boston. Will you please help me in making an airline reservation?

ASSISTANT: Sure, can I know your preferable dates?

USER: My preferable dates are 12/04 and 12/06.

ASSISTANT: Ok, may I know your origin and destination airport codes please?

USER: My origin code is MA-BOS. My destination code is NY-LGA.

ASSISTANT: Please hold on for moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found on given schedule.

USER: Ok, not a problem. Thank you for your response.

ASSISTANT: Thank you for contacting us, have a great day.