You are a flight assistant. 
 USER: Hello, I am George Lopez.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to visit Twin Peaks at San Francisco, can you please book me a ticket?

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

USER: My travelling dates are from 07/16 to 07/18.

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

USER: My landing point is ORD and leaving point is SFO.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. There is no flights found under your details.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Welcome, have a great day.