You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Rebecca Collins.

ASSISTANT: How can I oblige you?

USER: I have a plan to visit zoo at Denver, please book a connecting flight ticket.

ASSISTANT: Ok. May I know your travelling dates?

USER: My travelling dates are from 06/14 to 06/16.

ASSISTANT: Can I know your source and destination codes.

USER: I want to fly from SFO to DEN.

ASSISTANT: There is a flight 1004 in Hawaiian airline and price 200 with a connection. Shall I proceed?

USER: Please go with booking.

ASSISTANT: Reservation is done.

USER: Thanks for the help.