You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Carol Williams, want to travel from OAK to CLT. Please help me in booking my ticket.

ASSISTANT: Sure, I am here to help you for this. Could you please share me your travel dates?

USER: Sure, my trip dates are from 06/18 to 06/20.

ASSISTANT: Is there any airline preference?

USER: No, there is no airline preference.

ASSISTANT: At what time are you planning to depart and return?

USER: My departing time should be used in morning.

ASSISTANT: Is there any other preference?

USER: Yes, I need a connecting flight.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you very much for reaching us.