You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: Please help me to book a flight ticket from OAK to SEA.

ASSISTANT: Sure, I am here to help you in booking. Can I have your travel dates please?

USER: My trip dates are from Nov, 20 to Nov, 22.

ASSISTANT: May I know your name?

USER: My name is Angela Roberts.

ASSISTANT: Do you have any specification?

USER: I need a single connecting flight and I prefer normal-cost airline.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: we found a flight 1000 in UA airlines with 1 stopover and it costs you 100 in economy class. Can I proceed?

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you for booking. Most Welcome.

ASSISTANT: Thank you for reaching us, have a great day.