You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I am Timothy Lee, I want a flight to Phoenix to attend the World Mobile Congress. Can you book a connecting flight?

ASSISTANT: Sure, May I know the journey codes?

USER: I will travel from Chicago, IL-ORD to AZ-PHX.

ASSISTANT: Please help me with your travel dates.

USER: I like to travel on 11/20 and return on 11/22.

ASSISTANT: Please wait a second.

USER: Sure.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.