You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Justin Lopez.

ASSISTANT: How can I aid you Justin Lopez?

USER: I want to attend a friend's marriage at Oakland, so can you book a ticket from DFW to OAK?

ASSISTANT: Sure. May I know your date of journey?

USER: My journey dates are from 10/03 to 10/05.

ASSISTANT: Ok, please wait for a while. Thanks for being patience. We found that there were no flights that matches with your information.

USER: Ok, thank you for information.

ASSISTANT: Thanks for opting us.