You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Rachel Collins. Can you please make my reservation from HOU to OAK?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, my travelling dates are May 13 and May 15.

ASSISTANT: Please provide your specifications.

USER: I would like to return in the evening time.

ASSISTANT: Do you need any connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: We are sorry to inform you that there is no flight found with your given information.

USER: No problem, thank you for your information.

ASSISTANT: Thank you.