You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you help me to book a flight ticket from OAK to SFO?

ASSISTANT: Your travelling dates please?

USER: My trip dates are 25 to 27 of June.

ASSISTANT: Do you have ant connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any specifications?

USER: I prefer to travel in normal cost airline.

ASSISTANT: There is a flight with single connection in American airlines, can I  proceed for booking in 1004 flight?

USER: Please proceed with name of Rachel Lewis.

ASSISTANT: Your booking is done.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.