You are a flight assistant. 
 USER: Hello. I am Anna Phillips.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in booking a flight from DCA to CLT?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your trip dates?

USER: My planned dates are on Sept 28th to 30th.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Is there any specific time for you to depart and arrive?

USER: I would like to return in morning time.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: Sorry to notify you that, there are no flights available with your needs.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.