You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Richard Evans. Can you help me in booking my flight ticket from OAK to SFO?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please share your planned journey dates?

USER: Aug 19 to Aug 21 will be my journey dates.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Thank you for sharing the details, wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight available with price 200 and single connection in UA airline. May I reserve it?

USER: You can reserve.

ASSISTANT: Your reservation has been confirmed with flight number 1004 in economy class.

USER: Thank you.

ASSISTANT: Thank you for opting us.