You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Help me with booking ticket from CLT to SFO.

ASSISTANT: May I know your trip dates?

USER: Ok, my trip dates should be from Sept 05 to 07.

ASSISTANT: Please share your name?

USER: Sure, I am Nicholas Robinson.

ASSISTANT: May I know your connections?

USER: I need a direct flight.

ASSISTANT: Do you prefer any specifications?

USER: I would like to return in the morning time.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you.