You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Shirley Harris here. I want to meet my brother on his birthday, so please book my ticket from IAH to OAK.

ASSISTANT: Sure, I am gleeful to assist you. Is there any connection limit for you?

USER: No, I prefer economy class.

ASSISTANT: May I know on what dates would you like to travel?

USER: My itinerary dates are Oct 6 and Oct 8.

ASSISTANT: Thanks for your details, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, no flights were found based on your schedule.

USER: No problem, I will find an alternative mode of transport.

ASSISTANT: Thank you for visiting us.

USER: Thank you.