You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: My name is Shirley Rodriguez from Los Angeles.

ASSISTANT: Ok.

USER: I want to attend for an interview in Denver, CO - DEN. Can you please aid me for booking?

ASSISTANT: Sure, I am here to help you. May I know your travelling dates?

USER: Sure, my travelling dates are 01/27 to 01/29.

ASSISTANT: Will you please help  me with your source code?

USER: Sure, it is CA - LAX.

ASSISTANT: Ok Shirley Rodriguez. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you for choosing us, have a nice day.