You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I need to book a flight ticket to Washington on 12/15 to attend my baby shower.

ASSISTANT: Sure, may I know your good name please?

USER: My source is at Charlotte on 12/17. I am Mary Miller.

ASSISTANT: Ok, can you please mention your airport codes?

USER: My airport codes are NC - CLT and DC - DCA.

ASSISTANT: Please wait a moment. Let me check and revert you.

USER: Sure.

ASSISTANT: Thank you for being patient. There is a Hawaiian airline with flight number 1020 and price of 200 matching with your request. Can I proceed with this airline?

USER: Ok, you can proceed.

ASSISTANT: Ok, your reservation is done.

USER: Thanks for your response.

ASSISTANT: Thank you and have a great day.