You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Can you book a flight ticket from PHL to SEA?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travel dates are in the month of Mar form 4th to 6th.

ASSISTANT: Do you have any limits on number of connections?

USER: I want single connecting flight.

ASSISTANT: Do you have any air line preferences on this journey?

USER: I prefer normal cost airlines.

ASSISTANT: Thank you, may I know your name for the documentation purpose?

USER: It's Helen Moore.

ASSISTANT: Do you have any class preference ?

USER: No.

ASSISTANT: Unfortunately, no flights available on your requirements.

USER: That's ok, thanks for checking.

ASSISTANT: Welcome, thank you for reaching us.