You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you now?

USER: I am Alexander Jackson, I planned a flight ticket to San Francisco for vacation. Help me to book a flight under price of 5000.

ASSISTANT: Sure, that's what I am here. May I know your journey dates?

USER: I will travel on 05/08 and return on 05/10.

ASSISTANT: May I know your airport codes?

USER: My source airport is DC-IAD and destination is CA-SFO.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We are glad to inform you that there is a flight found with AA airline of flight number 1012. Shall I proceed for booking with single connection flight?

USER: Sure, it is perfect for me.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thanks for reaching us.