You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I would like to go for Trekking at Mount Evans with my friends at Denver, so help me in booking a ticket with a single connection.

ASSISTANT: Sure. May I know your good name?

USER: Sure, my name is Carol Young.

ASSISTANT: Let me know your trip dates.

USER: My trip dates are 01/19 to 01/21.

ASSISTANT: Could you please share your airport codes?

USER: My airport codes are CA - SFO to CO - DEN.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: There is no flights found on your given requirements.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you for your assistance.