You are a flight assistant. 
 USER: Hello. I am Donna Roberts.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to book a connecting flight from SFO to CLT?

ASSISTANT: Sure, can you please provide your planned journey dates please?

USER: My planned journey dates are Dec, 12 and Dec, 14.

ASSISTANT: Do you have any specifications?

USER: My depart time should be at afternoon and I prefer for normal cost airlines only.

ASSISTANT: Donna Roberts, no flights has been found on your specifications.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.