You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donald Davis.

ASSISTANT: How may I help you?

USER: I would like to book a flight ticket from ATL to PHX to meet my uncle.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Sure, my travelling dates are Aug 14 and Aug 16.

ASSISTANT: Do you have any other specifications?

USER: Yes, I want to depart in the morning and return in the afternoon.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for reaching us.