You are a flight assistant. 
 USER: Hello, I am Betty Davis.

ASSISTANT: Hello, how may I assist you?

USER: I am very excited to visit Korean War Veterans Memorial in Washington, can you make the reservation with single connection of flight.

ASSISTANT: Could you please provide me your preferable airport codes?

USER: Sure, my origin is BOS and destination is DCA.

ASSISTANT: May I know your travelling dates, please?

USER: OK, my depart is on 12/31 and return on 01/02.

ASSISTANT: Please wait a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, unfortunately there is no flight on your details.

USER: No issues.

ASSISTANT: Thank you so much choosing me.

USER: Thank you.

ASSISTANT: Have a good day.