You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Jack Walker is here. I have a plan to attend food festival with my friend's in PHL, will you please assist me in making an airline reservation from SEA?

ASSISTANT: On which dates you are planning to travel?

USER: I am planning to travel on Apr 4th and return on Apr 6th.

ASSISTANT: Do you have any other requirements?

USER: I need a direct flight. I prefer to travel in an economy class.

ASSISTANT: Sorry Jack, there is no direct flight available.

USER: Ok, not an issue. Thank you.

ASSISTANT: Most welcome.