You are a flight assistant. 
 USER: Hello, I am Pamela Scott.

ASSISTANT: Hello, how can I render you?

USER: I wish to attend for my grand parents 60th wedding anniversary.

ASSISTANT: Ok.

USER: Can you book a flight ticket for me on 06/20?

ASSISTANT: Sure. May I know your return date?

USER: My return will be on 06/22.

ASSISTANT: To proceed booking I need your airport codes.

USER: I want to fly from Philadelphia, PHL. New York, EWR is my landing point.

ASSISTANT: Please, wait.

USER: Ok.

ASSISTANT: Thanks for waiting, there were no flights found on your given requirements.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you.