You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Lee.

ASSISTANT: How may I help you?

USER: I am planning to visit Chicago from CLT to ORD. Can you make a reservation for me?

ASSISTANT: Ok Shirley Lee, I can help you with the flight ticket reservation.

USER: Thank you.

ASSISTANT: Can you please share your departure and arrival dates of your journey?

USER: Sure, my planned journey dates are on  05/27 and return on 05/29.

ASSISTANT: Ok, please hold on for a minute.

USER: Sure, take your own time.

ASSISTANT: Sorry for the trouble which is caused, there is no flight available in this route on the dates you have provided.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are welcome. Thank you for reaching us.