You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hi, how can I assist you today?

USER: I need to book a ticket from SFO to SEA. Could you book a ticket?

ASSISTANT: Sure, can you share your travel dates?

USER: Travel dates are Sept, 3 and Sept, 5.

ASSISTANT: Ok, may I know your preferred airline?

USER: I prefer normal-cost airline.

ASSISTANT: Would you like a break in your journey?

USER: I need connecting flight.

ASSISTANT: Do you need any other requirements?

USER: I would like to depart in the morning.

ASSISTANT: Ok, let me know your name please?

USER: My name is Patrick Carter.

ASSISTANT: Sorry, no flights are running on that route with your preferred dates.

USER: Thank you.

ASSISTANT: Thank you for contacting us.