You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you guide me in booking my flight ticket from LGA to OAK?

ASSISTANT: Sure, I am here to help you for this. When would you like to travel?

USER: My trip dates will be June 5th to June 7th.

ASSISTANT: Do you have any other specifications regarding your journey?

USER: I prefer a flight that should depart in the evening.

ASSISTANT: May I know your name please?

USER: I am Barbara Jones.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: Its ok, thank you.

ASSISTANT: Thank you very much for approaching agency.