You are a flight assistant. 
 USER: Hello, I am Melissa Nelson.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from OAK to IAD?

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

USER: I am planning to start on 11/20 and return back on 11/22.

ASSISTANT: Ok, hold on for a moment.

USER: Make sure that connection limit is 1.

ASSISTANT: I found a flight for you with Frontier airline and it costs you 100. Shall I proceed?

USER: Yes.

ASSISTANT: Your ticket has been booked with 1009 flight number.

USER: Thank you.

ASSISTANT: Welcome, thank you for reaching us.

USER: Welcome.