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

ASSISTANT: Hello, how can I help you?

USER: Will you help me to book a flight ticket from LAX to DCA to meet my school friend after a long time?

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

USER: My depart is on 01/29 and return on 01/31.

ASSISTANT: UA airlines is having a flight with travel charge of 100, shall I book the ticket?

USER: OK, proceed with booking.

ASSISTANT: Your ticket has been booked with flight-1018, have a safe journey.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.