You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am planning to attend music concert at OAK, can you please help me with booking a flight ticket from EWR?

ASSISTANT: Sure, please share me your trip dates.

USER: Sure, I would like to take off  on July 27 and return on July 29.

ASSISTANT: Is there any class preferences for you?

USER: I would prefer business class.

ASSISTANT:  Do you need direct flight or connecting flight?

USER: I need a flight with 1 connection.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: My name is Charles Moore.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for opting us.