You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide service to you?

USER: Can you book a flight ticket from PHL to reach SEA?

ASSISTANT: Sure, I can book a ticket for you. May I know your journey dates?

USER: Feb 2nd - Feb 4th are my planned trip dates.

ASSISTANT: Ok, please let me know your name.

USER: I am Anthony Smith.

ASSISTANT: Do you have any other concerns?

USER: Yes, I need a flight in major airline in economy class.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, unfortunately no flights are running on your desired route.

USER: Ok, not a problem. Thank you.

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