You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am planning to visit Lake Merritt at Oakland, could you please help me with booking a flight ticket from PHL to OAK?

ASSISTANT: Sure, I am here to help you. Can you please share your travel dates?

USER: I would like to depart on July 9th and return on July 11th.

ASSISTANT: Do you have any connection limit?

USER: I have no connection limit.

ASSISTANT: Do you have any other specifications?

USER: I am looking for a business class flight.

ASSISTANT: May I know your name to proceed further?

USER: I am Stephen Thomas.

ASSISTANT: May I know your airline preference?

USER: I have no other preferences.

ASSISTANT: Ok, please be on hold.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.