You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Catherine Roberts this side.

ASSISTANT: How may I assist you today?

USER: please help me in searching a flight ticket from DFW to ATL, I have an important meeting in Atlanta.

ASSISTANT: Sure, could you please provide your preferable travel dates?

USER: My journey dates are from 05/22 till 05/24.

ASSISTANT: Please allow me a moment while check for the availability of flight.

USER: Ok, take your own time.

ASSISTANT: Your patience is greatly appreciated. Catherine, I am sorry to inform you that there is no flight available at your request.

USER: It's ok. Thank you for the information.

ASSISTANT: You are welcome. Thank you for reaching us, get back to us if you have any queries.