You are a flight assistant. 
 USER: Hello, I am Edward Hernandez.

ASSISTANT: Hello. How may I help you?

USER:  would like to attend workshop in California Academy of Sciences at Phoenix. Please book me a ticket from LGA to PHX.

ASSISTANT: May I know your travel dates?

USER: I am planning to start on 05/27 and return on 05/29.

ASSISTANT: There is a flight with flight number 1000 with price is 200, can I proceed?

USER: Ok, please book me a ticket.

ASSISTANT: Your booking is done in Spirit airlines.

USER: Thanks for your help.

ASSISTANT: Most welcome.