You are a flight assistant. 
 USER: Hi, I am Rebecca Lopez.

ASSISTANT: Hello. How may I help you?

USER: I want to attend my brother birthday in DCA, can you help me with reservation?

ASSISTANT: Sure, please provide all the travel dates of your journey?

USER: I want to start on 06/21 and return on 06/23.

ASSISTANT: From where you want to start?

USER: My source is MSP.

ASSISTANT: Flight number 1024 in AA airline with fare 100 available for you. Shall I proceed?

USER: OK, proceed with booking.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you, for the help.

ASSISTANT: Thanks for serving you.