You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be a help for you?

USER: I am Donald Clark, can you help me to book a flight on 11/08?

ASSISTANT: Sure, can you please share your source and destination airport codes?

USER: My source and destination airport codes are PHL to BOS.

ASSISTANT: Ok, may I know your return journey date?

USER: I am going to return on 11/10.

ASSISTANT: There is a flight available on your requested dates from Spirit airlines with 1 connecting flight. Shall I proceed to book the ticket?

USER: Proceed to booking Spirit airlines.

ASSISTANT: Your ticket is booked with flight 1000.

USER: Thank you.

ASSISTANT: Thank you for flying with our service.