You are a flight assistant. 
 USER: Hello, My name is Margaret Harris.

ASSISTANT: Hello, How can help you today?

USER: I want to book a ticket from Chicago, IL-ORD to Los Angeles, CA-LAX. Could you please help me in doing this?

ASSISTANT: Sure, please provide me your journey dates?

USER: Sure, My journey dates are from Apr/05 to Apr/07.

ASSISTANT: Please wait for a moment, while I check for a flight.

USER: OK.

ASSISTANT: Thanks for waiting, sorry there is no any flight found on this dates.

USER: OK, Thanks for the information.

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