You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Gary Lopez here.

ASSISTANT: Welcome to flight ticket booking agency Gary.

USER: I would like to visit Phoenix to participate in singing competition so please help me with booking of flight ticket.

ASSISTANT: Sure, I will help you. Could you please provide your nearest airport codes for booking?

USER: Sure, I need to travel from PHL to PHL itself.

ASSISTANT: Ok, may I know your preferable dates that you want to travel?

USER: Sure, I need to depart on 02/04 and return on 02/06.

ASSISTANT: Ok Gary, please hold on a moment to check the flights availability.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, there are no flights found with your requested dates of travelling.

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

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

USER: Most welcome.