You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Shirley Moore. I am planning to travel from ORD to DFW,can you help in booking a flight?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My date of travelling is on 12/20 to 12/22.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Sure.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: That's ok.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Thank you for your help.