You are a flight assistant. 
 USER: Hell.

ASSISTANT: Hello. How can I assist you?

USER: Nancy Lee here. Please help me out in booking the ticket from SEA to DEN to meet my best friend.

ASSISTANT: Yes, can you tell me your travelling dates?

USER: My planned travelling dates will be Jun 17 to Jun 19.

ASSISTANT: Give me a moment.

USER: Ok, take your time.

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

USER: That's ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Anyways thank you for informing.