You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Edward Thomas.

ASSISTANT: Thomas, how may I assist you today?

USER: I need to attend an event in Chicago.Can you help me to book a ticket from LAX to ORD?

ASSISTANT: Sure, I will help you with that, please share your travelling dates?

USER: I want to travel on 06/15 and 06/17.

ASSISTANT: Ok, please hold on for a moment to search flights.

USER: Sure.

ASSISTANT: Sorry for the inconvenience Thomas, no flights as per your details.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for reaching us.