You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to attend the US champion ship in Houston, can please help me in booking my flight ticket?

ASSISTANT: Sure. May I know your airport codes?

USER: My airport code are OAK and IAH.

ASSISTANT: Let me know your travelling dates.

USER: I want to travel on 07/06 and intend to return on 07/08.

ASSISTANT: May I know your good name?

USER: My name is Deborah Taylor.

ASSISTANT: Thanks for your details.

USER: Ok.

ASSISTANT: There is no flights found on your data.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.