You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Patricia Turner. Can you please assist me in booking a ticket to New York, NY-LGA for attending a conference?

ASSISTANT: Sure, may I know your journey dates?

USER: My travel dates are from 01/05 to 01/07.

ASSISTANT: Can I know your source code?

USER: My source is at Minneapolis, MN-MSP.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: Ok, no problem. Thank you.