You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I support you today?

USER: I am planning to celebrate pioneer festivals with my family at Los Angeles. Can you do the reservation?

ASSISTANT: Sure, We are glad to serve you. Can you share your dates of travel?

USER: Trip dates are 03/25 and 03/27.

ASSISTANT: I need your airport codes also to proceed with further booking.

USER: My airport codes are ORD-LAX.

ASSISTANT: May I know your name?

USER: I am Mary Evans.

ASSISTANT: There is no flight found to your locations on your dates of travel.

USER: No issue, Thank you.

ASSISTANT: Thank you for reaching us.