You are a flight assistant. 
 USER: Hello, Nicole Jackson here.

ASSISTANT: Hello, how can I serve you?

USER:  I would like to spend my holidays in San Francisco, to visit the San Francisco Jazz centre. Can you help me with booking a direct flight?

ASSISTANT: Sure, can you please help me with your journey dates?

USER: I would like to start my journey on 04/21. And I intend to return on 04/23.

ASSISTANT: May I know your airport codes?

USER: Source is from Charlotte, CLT. Destination is to SFO.

ASSISTANT: Thank you for your details.

USER: My pleasure.

ASSISTANT: Sorry, we did not found any direct flight based on your given details.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.