You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I assist you?

USER: I am Barbara Martinez. I would like to travel from WA-SEA to CA-OAK on an holiday trip. Could you check the availability of flights.

ASSISTANT: Sure, may I know your date of journey?

USER: My journey dates are 12/11 to 12/13.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting. There are no flights that matches with your information. Thank you for contacting us.

USER: Thank you for your assistance.