You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to meet my client at New York, can you please help me to book my flight ticket?

ASSISTANT: Can I know your travelling dates?

USER: Sure, I will depart on Oct 31st and return back on Nov 2nd.

ASSISTANT: Let me know your airport codes.

USER: I want to travel from IAH to LGA.

ASSISTANT: Can I know your name?

USER: My name is Gregory Walker.

ASSISTANT: Do you have any preference?

USER: I want to return back in the morning.

ASSISTANT: Connecting flight can be booked with airline Delta for price 100 having flight number 1004.

USER: Please book the ticket for me.

ASSISTANT: Ticket is booked.

USER: Thank you very much.

ASSISTANT: Thank you.