You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patricia Lee.

ASSISTANT: Patricia Lee, how may I render you?

USER: I have a plan to attend the nature festival in Seattle, can you please book a flight ticket from PHL to SEA?

ASSISTANT: Sure, please provide your itinerary dates.

USER: My planned journey dates are Oct 15th and Oct 17th.

ASSISTANT: Do you have any specifications?

USER: I need a lay by.

ASSISTANT: Sorry, no flight is providing service on your planned dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.