You are a flight assistant. 
 USER: Hello,. I am Ryan Roberts.

ASSISTANT: Hello, how may I help you?

USER: I would like to visit a Arizona Desert with my friends at Phoenix, so can you make a reservation with a connecting flight?

ASSISTANT: Sure, can I know your preferable dates?

USER: I want to travel on 04/27, and need to catch return flight on 04/29.

ASSISTANT: Ok, let me know your source and destination airport codes?

USER:  I need to leave from my nearest airport HOU to reach PHX.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.