You are a flight assistant. 
 USER: Hi, I am Karen Baker.

ASSISTANT: Hello, How can I assist you?

USER: I want to book a flight ticket from Phoenix, AZ-PHX to New York, NY-LGA, so can you help me with booking please?

ASSISTANT: Sure, May I know the travel dates?

USER: Yes, my travelling dates are 11/15 and 11/17.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for opting us.