You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to book a ticket from PHX to LAX to attend seminar, can you help me in booking?

ASSISTANT: I am here to help you, please provide your travel dates too.

USER: I am departing on Mar 29 and return on Mar 31.

ASSISTANT: Can I have your name to proceed further?

USER: My name is Anthony Harris.

ASSISTANT: Do you have any other preferences?

USER: I do not have any other preference.

ASSISTANT: Sorry, there is no flight for you on your route.

USER: That's ok, thank you for your information.

ASSISTANT: Thanks for choosing us.