You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you today?

USER: I want to participate in soft adventure sport at Oakland, can you help me to book a connecting flight?

ASSISTANT: Sure, may I know your travelling days?

USER: I want to travel on 12/20, and need to catch return flight on 12/22.

ASSISTANT: Can I know your travelling airport codes?

USER: Source is from Denver, CO - DEN. Destination airport code is CA - OAK.

ASSISTANT: May I know your good name to process your ticket?

USER: I am Eric Williams.

ASSISTANT: Thank you for your details, we found a flight 1018 in UA airlines the price is 100 with single connection. Shall I process your ticket?

USER: I am very comfortable to travel with airline UA. Reserve my seat.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your quick response.

ASSISTANT: Thank you for availing with us.