You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I serve you today?

USER: I am Raymond Baker. I am planning to attend an live music event in Denver, can you please help me to book a flight with direct connection?

ASSISTANT: Sure. May I know your travelling dates?

USER: My journey dates are from 08/03 to 08/05.

ASSISTANT: Let me know your airport codes.

USER: I want to fly from PHL - DEN.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no direct flight available with your given specified dates.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thanks for your service.