You are a flight assistant. 
 USER: Hi, I am Christine Carter.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket to attend a seminar at Los Angeles, so can you please book me a direct flight from Philadelphia?

ASSISTANT: Sure, kindly mention your travel dates?

USER: Sure, my travelling dates are 05/06 and 05/08.

ASSISTANT: Can you please share me your airport codes?

USER: My airport codes are PA-PHL and CA-LAX.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for reaching us, have a good day.