You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from OAK to LGA. Can you help me to book a flight ticket?

ASSISTANT: Sure, can I know your travelling dates?

USER: I want to fly in the flight on Mar 15 and Mar 17.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Sarah Parker.

ASSISTANT: Do you have any connection limit?

USER: I want to have a connecting flight.

ASSISTANT:  Do you have any other specifications?

USER: I prefer to travel in normal-cost airline.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us.