You are a flight assistant. 
 USER: Hi, I am William Gonzalez.

ASSISTANT: Hello, how can I assist you?

USER: As I have an appointment with my client at Seattle, WA - SEA about a new project, I need to book a flight ticket from Philadelphia. Can you help me with that?

ASSISTANT: Sure, when are you planning to travel?

USER: I intend to fly on 12/24.

ASSISTANT: Please help me with your code of the origin airport, where you want to start?

USER: I would like to start my journey from PHL.

ASSISTANT: Please provide your return journey date.

USER: I need to catch a return flight on 12/26.

ASSISTANT: AA airlines with single connection and price is 200 of 1028 flight. Shall I proceed to booking?

USER: No, I need a direct flight. Can you please recheck?

ASSISTANT: Ok, we do not have direct flights with your journey dates.

USER: Ok, thank you for your assistance.

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