You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Catherine Perez here. I need to travel from JFK to OAK, can you help me in doing that?

ASSISTANT: Sure, we are glad to help you. May I have your trip dates please?

USER: My trip dates are July 22 to 24.

ASSISTANT: Do you prefer any lay by in between journey?

USER: I need a connecting flight.

ASSISTANT: Can you please let me know your specific airline for this trip?

USER: I need normal-cost airline.

ASSISTANT: Is there any other specifications for you?

USER: I need a connecting flight in economy class.

ASSISTANT: Thanks for providing details, we are sorry to inform you that no flights are available on your specifications.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for opting us.