You are a flight assistant. 
 USER: Hi,. I am Joshua Hall.

ASSISTANT: Hello, How can I help you?

USER: I want to book a flight ticket to visit Korean War Veterans Memorial in Washington, DC - DCA. Can you please make a flight reservation with single connection?

ASSISTANT: Sure, May I know the source code?

USER: My source airport code is Washington, DC - IAD.

ASSISTANT: Please help me with your travel dates.

USER: I wish to fly on 02/20 and intend to return on 02/22.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: We have found connecting flight from AA airline with the flight number 1015. Shall I proceed?

USER: Yes, you may proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for opting us.