You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How shall I help you?

USER: I want to book a flight ticket from San Francisco on 05/23 to give a seminar and will return on 05/25. Please book me a ticket with a connection.

ASSISTANT: Ok. May I know your travelling codes?

USER: Sure, Its from CA-SFO to Denver, CO-DEN.

ASSISTANT: Connecting flight 1007 with airline AA is available for price 100.

USER: Ok, you can proceed with this.

ASSISTANT: Please provide your name.

USER: I am Donald Anderson.

ASSISTANT: Your ticket is booked.

USER: Thank you for your service.

ASSISTANT: Thanks.