You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to travel to Denver, CO - DEN to attend for an interview. Can you please book a connected flight?

ASSISTANT: Sure, kindly mention your travel dates?

USER: My travel dates are 04/29 and 05/01.

ASSISTANT: May I know your source airport code?

USER: My source is San Francisco, CA - SFO.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights with your requirement.

USER: Ok, no issues.

ASSISTANT: May I know your name?

USER: Sure, I am Dennis Miller. Thank you.

ASSISTANT: Thanks for reaching us.