You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Christine Smith from Atlanta. Can you please book a flight ticket from ATL to DFW?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Sure, I need to travel on dates of 05/03 and 05/05.

ASSISTANT: Ok. Sorry to say, no flights were found on your route.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us, have a nice day.