You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you?

USER: Please book a ticket to DEN to attend a meeting?

ASSISTANT: Sure, when are you willing to travel?

USER: My travel dates are from 06/03 to 06/05.

ASSISTANT: Help me with the source code?

USER: My source is at  CA-OAK.

ASSISTANT: May I know your name please?

USER: I am Larry Johnson.

ASSISTANT: We have found a AA airline of 1004 flight number with one connection of cost 100.

USER: You can proceed with booking. Thank you.

ASSISTANT: Your flight ticket is booked. Thank you.