You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Katherine Roberts.

ASSISTANT: Ok.How may I help you?

USER: I got admission in a New York college, so I would like to book a ticket from DCA.

ASSISTANT: Ok.Wait a moment, I will check the flight availability.

USER: Ok.

ASSISTANT: Please provide your destination airport code.

USER: EWR is my destination airport code.

ASSISTANT: Can you please tell me your travelling dates?

USER: My travelling dates are 09/10 and 09/12.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thanks for waiting.flight is available for your required details.

USER: Please book my ticket.

ASSISTANT: Ok.The flight number is 1029.

USER: Thank you for you help.

ASSISTANT: Ok.Thank you, have a safe journey.