You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to meet my brother on his birthday, so please book my ticket from OAK to JFK.

ASSISTANT: Ok, please can I know your name to proceed?

USER: Mary Edwards here.

ASSISTANT: Ok, can you let me know the dates?

USER: My itinerary dates are June 3 and June 5.

ASSISTANT: Please can I know your specification?

USER: I want to depart in the evening.

ASSISTANT: Sorry, there are no flight tickets available at your location to book.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing our agency.