You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I would like to book a flight ticket from NY to attend a business meeting in CA, could you please help me to book a flight ticket?

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: Sure, I need to start on 01/14 and my return date will be on 01/16.

ASSISTANT: May I know your name please?

USER: I am James Walker.

ASSISTANT: Can you please share your source and destination airport codes?

USER: My boarding and landing airport codes are JFK and OAK.

ASSISTANT: Do you have any other specifications?

USER: No more specifications please.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.