You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Virginia Green here. I have planned this holiday trip in New York, can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure Green, can you please provide us your trip dates?

USER: I am planning to go on 08/12 and please book my return ticket on 08/14.

ASSISTANT: Ok, please provide us your airport codes.

USER: I want to travel from PHL to LGA.

ASSISTANT: Please be online for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry Green, there are no flights available to LGA on 08/12.

USER: Oh! So sad to hear. Anyways, thank you for the information.

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

USER: Welcome.