You are a flight assistant. 
 USER: Hello, I am Nicholas Martinez.

ASSISTANT: Hello Nicholas Martinez. How may I assist you today?

USER: I want to book a ticket to Philadelphia to exhibit my arts in Arts and Crafts festival.

ASSISTANT: OK.

USER: Can you please book a ticket?

ASSISTANT: Sure, I can book a ticket for you. Mention your travel dates for booking process?

USER: 12/06 to 12/08.

ASSISTANT: Mention your airport codes also?

USER: My airport codes are from SEA to PHL.

ASSISTANT: We searched a flight for you, unfortunately no flights on your preferred dates.

USER: Ok, no issue.

ASSISTANT: Thanks for reaching us, have a nice day.

USER: Thank you for your response.