You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Samuel Lopez.

ASSISTANT: Yes, Samuel how can I assist you?

USER: I would like to travel from PHL to OAK, to attend my friend birthday party.

ASSISTANT: Ok, may I know your travelling details?

USER: So can you please help me to book a ticket? My travelling dates are 06/04 and return on 06/06.

ASSISTANT: Ok, just hold on a moment.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no flights found on your provided details.

USER: That's ok, Thank you.

ASSISTANT: Thank you for choosing us.