You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to book a flight from IAD to OAK, can you please help me to book a flight ticket?

ASSISTANT: Sure, let me know your trip dates?

USER: Sure, my travelling dates are June 05 and June 07.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any time concern?

USER: No.

ASSISTANT: Can I know your name?

USER: My name is Barbara Jones.

ASSISTANT: We found a connecting flight 1004 in United airline with fare 100 and class is economy. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.