You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I want to submit my seminar record with my colleagues at Philadelphia PA-PHL, could you help me with booking a direct flight?

ASSISTANT: Sure, may I know your planned dates of travel?

USER: My preferable travel dates are 06/26 and 06/28.

ASSISTANT: Could you please provide your source code?

USER: Source code is New York NY-EWR.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we did not find any direct flight on your preferable dates.

USER: Ok, no issues.

ASSISTANT: May I know your name?

USER: I am Susan Turner. Thank you.

ASSISTANT: Thank you for availing us.