You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Samantha Lee, can you help me to book a flight on 05/20 with 0 connection?

ASSISTANT: Sure, can you please mention with your airports codes of travel?

USER: My airport codes are DFW and PHX.

ASSISTANT: May I know your return date please?

USER: My return date would be on 05/22.

ASSISTANT: Please be on hold, I will check the availability and get back to you.

USER: Ok.

ASSISTANT: Sorry, there is no fight found as per your travelling details.

USER: No issues, thank you for your help.

ASSISTANT: You are welcome.