You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Cynthia Martin here.

ASSISTANT: How can I assist you today?

USER: I have to host a program in Los Angeles, can you please help me in booking the ticket from Chicago?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, my planned travel dates are 07/10 and 07/12.

ASSISTANT: Please provide your airport codes that you want to travel.

USER: My from and to airport locations are ORD and LAX.

ASSISTANT: Please give me a moment.

USER: Sure, I'll be on hold.

ASSISTANT: Thanks for waiting, there is no flights available under your preferable details.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Welcome, have a great day.