You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Cynthia Taylor here. I would like to book a ticket to Los Angeles as I was invited for a wedding ceremony.

ASSISTANT: Sure, kindly assign your preferred dates of travelling?

USER: My itinerary dates are as follows Dec 24 and Dec 26.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: My genesis and terminus airport codes are CLT and LAX.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found on your travel dates.

USER: No issue, Thank you for the information.

ASSISTANT: Thank you for reaching us.