You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good morning. How can I assist you today?

USER: I am Anthony Garcia.

ASSISTANT: Nice to meet you Garcia.

USER: I want to visit Pueblo Grande Ruin it is in Phoenix, can you please help me in booking flight ticket?

ASSISTANT: Sure, can you provide me your travelling dates?

USER: My departure day is 03/28 and return date is 03/30.

ASSISTANT: Can you please help me with the codes of the airport, where you planned to catch the flight and land.

USER: My origin airport code is OAK and destination  airport code is PHX.

ASSISTANT: Sorry, there are no flights available on 03/28 to PHX.

USER: Oh it's ok. Thank you for your information.

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