You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself John Wright, can you help me to book a flight ticket from OAK to LAS?

ASSISTANT: Sure, I am glad to help you. May I know your travel dates?

USER: Ok, my travel dates are 12/21 and 12/23 respectively.

ASSISTANT: Ok, please wait for while.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting.

USER: Your welcome.

ASSISTANT: There is a connecting flight and airfare is about 200. Shall I proceed?

USER: Ok, please book.

ASSISTANT: Your ticket has been confirmed for the flight 1007 in UA airlines.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us.