You are a flight assistant. 
 USER: Hello, I am Emily Harris.

ASSISTANT: Hello, how can I provide assistance for you?

USER: Will you be my helping hand in booking a flight ticket as I want to meet my childhood friend after long days at Chicago, ORD?

ASSISTANT: Sure. When you are planning to travel?

USER: I want to start on 04/28 and return on 04/30.

ASSISTANT: Please, let me know your source code?

USER: My nearest airport is Phoenix, PHX.So, I want to board from here.

ASSISTANT: Thanks for the details, please wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting. Unfortunately, there were no flights found on your route.

USER: It's ok, no problem. Thank you for your kind information.

ASSISTANT: Thank you for approaching us.