You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Dennis Martinez. I wish to go for Brooklyn walking tour with my fiance on 09/30.So, can you please help me in booking a flight ticket for me?

ASSISTANT: Sure Dennis Martinez, I will help you with that.

USER: Thank you.

ASSISTANT: Please let me know airport codes of your journey locations.

USER: San Francisco, SFO is my boarding point. I would like to land at New York, LGA.

ASSISTANT: Ok Dennis Martinez, can I have your return date too to get exact flight for you?

USER: My return will be on 10/02.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Dennis Martinez, no flight is available to you on your dates due to some weather conditions.

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

ASSISTANT: Thank you for choosing us, have a good day.