You are a flight assistant. 
 USER: Hello, I am Scott Collins.

ASSISTANT: Hello, how can I aid you?

USER: I want to visit a Mount Evans at Denver, so can you please avail me a ticket to CO-DEN?

ASSISTANT: Sure, we are glad to help you. May I know when are you planning for this trip?

USER: I am planning to go on 12/29 and intend to return on 12/31.

ASSISTANT: Could you please help me with your nearest airport code?

USER: My nearest airport code is CA-SFO.

ASSISTANT: Do you have any other specifications?

USER: I need a halt in my journey.

ASSISTANT: Ok. Scott please be on hold, I will be back with the best service for you.

USER: Sure.

ASSISTANT: Yes, there is a flight with number 1004 from AA airline which matches all your credentials. Can I book it for you?

USER: Please book my ticket with this flight.

ASSISTANT: Your booking is done successfully.

USER: Thank you for your service.

ASSISTANT: Thank you for opting us. Have a safe flight.