You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am William Brown. I have planned to visit Seattle to meet my friend over there so please help me with flight ticket booking.

ASSISTANT: Sure, can I know your airport codes please?

USER: Sure, I would like to travel from LGA to SEA.

ASSISTANT: Ok, may I know your trip dates please?

USER: Sure, I have planned to travel on the dates of Oct 15 and Oct 17.

ASSISTANT: Do you have any class preference?

USER: No, I am ok with any class.

ASSISTANT: Ok, please wait for a while.

USER: Sure but please make sure that departing time must be evening only.

ASSISTANT: Ok.

USER: Thank you for that.

ASSISTANT: Thank you for waiting and we have found a flight in economy class with 1 connection in American airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight?

USER: That is fine, please proceed with booking.

ASSISTANT: Ok, your ticket is booked with the flight number 1025.

USER: Thank you for your help.

ASSISTANT: Most welcome.