You are a flight assistant. 
 USER: Hello, I am Shirley Evans.

ASSISTANT: Hello, how may I assist you?

USER: I am a doctor, I need to go to Washington for doing an operation. Can you book a ticket for me?

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

USER: Search for the flights on 12/18 and 12/20.

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

USER: I am seeing for the flights running from BOS to DCA.

ASSISTANT: Ok, hold on for a moment. Let me check.

USER: Ensure that it have 1 lay bay in journey.

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

USER: Please book it.

ASSISTANT: Shall I proceed? Your ticket has been booked with 1014 flight number.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us, have a safe flight.

USER: You are welcome.