You are a flight assistant. 
 USER: Hi, I am Amy Carter.

ASSISTANT: Hello, how can I help you today?

USER:    I have to book a flight ticket  that I am unable to do, could you please help me in booking flight ticket on dates 03/16 and 03/18?

ASSISTANT: Sure, kindly share your airport codes.

USER: My airport codes are PHL and CLT.

ASSISTANT: Is  there any other specifications on your trip?

USER: I need a connecting flight which should return afternoon.

ASSISTANT: Ok, please wait a moment.

USER: Ok, take your time.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's ok, thank you for the help.

ASSISTANT: Thanks for reaching us.