You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Steven Moore. I want to make a reservation to Phoenix, PHX to meet my grandmother. Can you find a direct flight?

ASSISTANT: Sure, please share me your travelling dates?

USER: Travelling dates are on 08/12 and 08/14.

ASSISTANT: Kindly assign me your source code?

USER: Source code is New York, LGA.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, to inform you that there are no flights with your specifications.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your response.