You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Debra Lewis from Detroit.

ASSISTANT: How may I assist you?

USER: I would like to watch Magic Show at Washington. Can you help me in booking a ticket?

ASSISTANT: Sure, may I know your nearest airport codes?

USER: The airport codes are DTW and IAD respectively.

ASSISTANT: When would you like to start your journey?

USER: I am planning my journey on 03/16 and return on 03/18.

ASSISTANT: I found a flight in AA airlines with price 100. Can I book the ticket for you?

USER: Please book the ticket.

ASSISTANT: Your ticket is confirmed and the flight number is 1026.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us.