You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Melissa Allen.

ASSISTANT: How can I help you?

USER: I am planning to visit New York to meet my friend, can you please book me a ticket from Washington?

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

USER: My nearest airport codes of travelling are from DCA to LGA.

ASSISTANT: Can you please share your travel dates?

USER: My planned dates of journey are from 06/09 to 06/11.

ASSISTANT: Spirit airlines is having a flight with travel charge of 200, shall I proceed for booking?

USER: Please reserve my ticket with this flight.

ASSISTANT: Your ticket has been booked with flight-1001, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.