You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Can you please help me in booking the ticket from EWR to OAK?As I need to attend a wedding.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, my planned departure and return travel dates are 28th and 30th of July.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: Both are ok for me.

ASSISTANT: Ok, may I know your airline preference?

USER: I'm ok with any airlines.

ASSISTANT: Ok, could I have your name please?

USER: My name is Kathleen Green.

ASSISTANT: Sorry, there is no flight with your request.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: You are welcome.