You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Alexander Smith.

ASSISTANT: Alexander Smith, how can I render you today?

USER: I am looking for a flight from MCO to SEA, can you help me out?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My trip dates are from Dec 15th till Dec 17th.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure.

ASSISTANT: Sorry Alexander Smith, there are no flights available on your requested dates.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.