You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Linda Johnson.

ASSISTANT: How may I assist you?

USER: I would like to met my friend at Denver, will you help me in booking the flight ticket from ORD to DEN?

ASSISTANT: Sure, can I have your planned dates please?

USER: My travelling dates are 02/13 and 02/15.

ASSISTANT: Please hold on a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Linda, no flights has been found on your journey dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for approaching us.