You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Jack Walker.

ASSISTANT: How can I support you?

USER: I would like to attend a meeting in Texas School Book Depository at Dallas & Fort Worth, DFW. My journey dates on 02/10 02/12.

ASSISTANT: Sure. May I know your origin?

USER: My origin point is New York, LGA.

ASSISTANT: Thanks for your details. There is no flights found on your data.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.