You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Deborah Adams. I want to travel on these days that is on 06/27 and return on 06/29. Can you find a flight ticket for me?

ASSISTANT: Ok, can I know your airport codes?

USER: Sure, my airport codes are from PHL to SEA.

ASSISTANT: I am sorry, there are no flights.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you, have a good day.