You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Susan Davis. I am planning to visit Disneyland at Los Angeles, could you please help me with booking a flight ticket from IAD to LAX/.

ASSISTANT: Sure, can you please share your travel dates?

USER: I would like to depart on Dec 24th and return on Dec 26th.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Susan Davis, I am sorry to inform you that there is no flight available at your requested dates.

USER: That's ok, not an issue. Anyways, thank you for the information.

ASSISTANT: You are welcome. Thank you for reaching us.