You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michael Gonzalez.

ASSISTANT: How may I lend a hand to?

USER: I am planning to attend music concert at OAK, can you please help me with booking a flight ticket from PHL?

ASSISTANT: Michael Gonzalez, I am here to help you for this. Could you please share me your travel dates?

USER: Sure, I would like to take off on July 20 and return on July 22.

ASSISTANT: At what time are you planning to depart and return?

USER: I would like to return during afternoon time.

ASSISTANT: Do you prefer any airline?

USER: No, but I need a flight with 1 connection.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you very much for approaching our agency.

USER: You are welcome.