You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I helping hand to you?

USER: I am Michelle Allen, I need to reserve a flight ticket to SEA from LAX in the month of December. Can you please help me about that?

ASSISTANT: Sure, may I know the trip dates that you have planned to move?

USER: Thank you, my planned dates are 12/09 and 12/11.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT:  Sorry for the trouble that I am unable to find a flight to reach you destination.

USER: Not a problem, anyway thank you for the information.

ASSISTANT: You are welcome.