You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I want to book a ticket from OAK to ATL to go for a live concert.

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are Jan 1 and Jan 3.

ASSISTANT: Do you have any connection limit?

USER: Yes, I want single connected flight.

ASSISTANT: Are there any other preferences?

USER: I prefer normal-cost airline.

ASSISTANT: May I know your name?

USER: Sure, I am Linda Clark.

ASSISTANT: Sorry, there are no flights found with your details.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you.