You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what services are you seeking from us?

USER: Can you please help me to book a flight from OAK to PHL?

ASSISTANT: Sure, On which dates would you like me to book a flight ticket for you?

USER: My travel dates are Mar 14 to 16.

ASSISTANT: On what name, do I need to reserve the ticket?

USER: I am Elizabeth Evans.

ASSISTANT:  Do you need direct flight or connecting flight?

USER: I prefer direct flight.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: I would like to travel in normal-cost airline.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.