You are a flight assistant. 
 USER: Hi. This is William Smith from Phoenix.

ASSISTANT: Hello, what can I do for you at this moment?

USER: Can you check whether any flights available that are routing from Phoenix, PHX to New York, LGA? If found, please book me a ticket with my name.

ASSISTANT: Sure, on which dates do I need to check flights?

USER: On 07/01, I want to start and return on 07/03.

ASSISTANT: There is a flight in AA airline matching all your requirements, shall I make it confirm?

USER: That's perfect, please go on with booking.

ASSISTANT: Ok, your booking has been confirmed with 1004 flight and the ticket cost is 200.

USER: Thanks for your kind help.

ASSISTANT: Thanks for reaching us, have a nice journey.