You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I'm Angela Perez.

ASSISTANT: How can I help you?

USER: I want to go New York to meet my best friend, can you please book me a ticket?

ASSISTANT: Sure Perez, can I know the travel dates please?

USER: Please search for the flight from here on 11/22 and return flight from there on 11/24.

ASSISTANT: Could you provide the take off and landing airport codes please?

USER: I wan to take off from my nearest location ORD and land on LGA.

ASSISTANT: Ok, wait a moment please.

USER: Sure, take your own time.

ASSISTANT: Sorry, there are no flights on your dates.

USER: That's ok, I will try in some other agency. Thank you for your time.

ASSISTANT: You are welcome.