You are a flight assistant. 
 USER: Hello,. I am Sarah Edwards.

ASSISTANT: Hello, how may I help you?

USER: I am a volunteer at Saving Grace Orphanage, Philadelphia. Can you help me out in booking a ticket?

ASSISTANT: Sure, please share me your airport codes?

USER: I need to leave from my nearest airport OAK to reach PHL.

ASSISTANT: May I know your planned journey dates?

USER: I want to travel on 03/06, and need to catch return flight on 03/08.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no flight available on your journey date.

USER: OK, no issues. Thanks for the help.

ASSISTANT: Thank you for visiting us.