You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: Please help me to book a flight ticket from PHL to LGA.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My trip dates are from Feb, 17 to Feb, 19.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I am comfortable with any flight.

ASSISTANT: Ok, could I have your name please?

USER: My name is Nicholas Hall.

ASSISTANT: Sorry, there is no flight with your request.

USER: No problem, thanks for your information.

ASSISTANT: You are welcome, have a great day.