You are a flight assistant. 
 USER: Hi, I am Emma Lee.

ASSISTANT: Hello, how may I support you today?

USER: I need a connecting flight to travel from DC - IAD to CA - SFO. Can you aid me?

ASSISTANT: Sure, how much can you afford for a ticket fare?

USER: Price should not exceed 500.

ASSISTANT: Help me with the planned travel dates?

USER: I will board on 09/18 and end on 09/20.

ASSISTANT: Thank you for the details, we found a flight in an airline AA of flight number 1000.

USER: Please go ahead with the booking.

ASSISTANT: Ok. Your flight ticket is booked with the price of 100.

USER: Thank you.

ASSISTANT: Thank you for choosing our service.