You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Catherine Gonzalez, I plan to visit Phoenix for adventure tour at red rock. Can you help me to find a direct flight?

ASSISTANT: Sure. May I know your travelling dates?

USER: I will travel on 11/19 and return on 11/21.

ASSISTANT: Can you share your airport codes?

USER: My source airport code is LGA and destination is PHX.

ASSISTANT: We could not find any direct flight with your dates.

USER: Ok, thanks for the information.

ASSISTANT: Thank you.