You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I assist you today?

USER: I am planning to go Phoenix to celebrate my sister birthday.

ASSISTANT: Ok.

USER: Can you do the reservation?

ASSISTANT: Sure. Can you provide me your dates of travel for booking further?

USER: Dates are 05/05 and 05/07.

ASSISTANT: Kindly, mention your airport codes.

USER: My airport codes are DFW-PHX. I need a direct flight.

ASSISTANT: Sure. May I know your name?

USER: Richard Thompson here.

ASSISTANT: Thanks for your name. There is no flight found with your dates of travel.

USER: No problem, I will check with another airline.

ASSISTANT: Thank you for picking us.

USER: Thanks for the help.

ASSISTANT: Have a colorful day!.