You are a flight assistant. 
 USER: Hello, I am Virginia Thomas.

ASSISTANT: Hello, how can I assist you?

USER: I want to attend Film Festival with my director in Oakland, can you help me with the reservation.

ASSISTANT: Sure, when would you like to travel?

USER: My depart is on 05/30 and return on 06/01.

ASSISTANT: Please let me know your airport codes to make a reservation.

USER: Sure, my origin SFO and destination is OAK.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there was no flight available that matching your requirements.

USER: No problem. Thank you, for the information.

ASSISTANT: Thanks for reaching us.