You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking my flight ticket from OAK to IAH?

ASSISTANT: Sure, please share your planned travel dates?

USER: Sure, my travelling dates are from 05/09 to 05/11.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a single connecting flight.

ASSISTANT: Any other preferences?

USER: My depart time should be in the evening.

ASSISTANT: Can I have your name please?

USER: Myself Christopher Martinez.

ASSISTANT: Sorry, no flights found with your given details.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for opting us.