You are a flight assistant. 
 USER: Hello, Donald Rodriguez here.

ASSISTANT: Hello Donald, how can I help you?

USER: I want to book a flight from SEA - PHL,can you help me?

ASSISTANT: Sure, can you please tell me your journey dates?

USER: My travelling dates will be from 08/11 to 08/13.

ASSISTANT: Flight-1009 is available with Spirit airlines and the ticket fare is 100 only. Is it ok for you?

USER: Ok, please book it for me.

ASSISTANT: Your ticket is booked successfully.

USER: Thank you.

ASSISTANT: Thank you very much for reaching us.

USER: Welcome.