You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please reserve me a flight ticket from IAD to LAS?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My travel dates are Dec 24 and Dec 26.

ASSISTANT: Do you have any preferences?

USER: My return time is in the morning.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: Ok, no issues. Thank you.

ASSISTANT: Can I know your name for documentation?

USER: I am Amanda Young.

ASSISTANT: Thank you for reaching us.