You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I would like to meet my grand parents at New York, please help me in booking a ticket from OAK to JFK.

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My journey dates are 04/03 and 04/05.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, no flight is available for you. May I know your name?

USER: Ok, no problem. My name is Barbara Collins.

ASSISTANT: Thank you for reaching us, have a nice day.